Home » Public Forums » GMCnet » Blower motor quit
| Blower motor quit [message #343842] |
Sat, 01 June 2019 19:55  |
Deb
Messages: 349
Registered: October 2016
Location: Logan Lake, BC
Karma: 2
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Senior Member |
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Well on the first trip of the summer just got to my destination after 5 hours of driving and the blower motor just quit. Checked the fuse box n the panel and its good. Is there is another spot that could have popped (a fusible link?). I found the main one i believe but not sure how to troubleshoot this blower.
Of course its hot. Would be very nice to run the fan while we drive. The dash ac was working although a bit puny. Ill be ok for the next 10 days since im basically parked. Only a couple of short hops before we head back on the 14th.
Suggestions of where to look and what to check? Hope its something i can wrangle (i brought my tools) and not needing a new blower motor right away. I would love to be able to get home and deal with it then.
Other than this the run down to Vancouver from Kamloops ( took Hwy 1 through the canyon) was uneventful. She ran great.
Deb McWade
Logan Lake, BC, CAN
GMC Alumnus
It's Bigger on the Inside!
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| Re: [GMCnet] Blower motor quit [message #343843 is a reply to message #343842] |
Sat, 01 June 2019 20:05  |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Fan relay, or poor ground on the fan motor. Screws there are exposed to
constant moisture here in the Northwest. One of the mounting screws has a
ground wire under the head. Those corrode and lose good contact. Little
stainless steel wire brushes and contact cleaner work well there.
Remote possibility that the resistor pack in the fan plenum on the
drivers side of the heater enclosure has failed, though high speed should
still work if the engine is running.
Jim Hupy
On Sat, Jun 1, 2019, 5:55 PM Deb McWade via Gmclist
wrote:
> Well on the first trip of the summer just got to my destination after 5
> hours of driving and the blower motor just quit. Checked the fuse box n the
> panel and its good. Is there is another spot that could have popped (a
> fusible link?). I found the main one i believe but not sure how to
> troubleshoot this blower.
>
> Of course its hot. Would be very nice to run the fan while we drive. The
> dash ac was working although a bit puny. Ill be ok for the next 10 days
> since
> im basically parked. Only a couple of short hops before we head back on
> the 14th.
>
> Suggestions of where to look and what to check? Hope its something i can
> wrangle (i brought my tools) and not needing a new blower motor right away.
> I would love to be able to get home and deal with it then.
>
> Other than this the run down to Vancouver from Kamloops ( took Hwy 1
> through the canyon) was uneventful. She ran great.
>
> --
> Deb McWade
> Logan Lake, BC, CAN
> "Li'l Sister"
> '77 Kingsley, 403, EBL EFI;
> TZE167V101404
> It's Bigger on the Inside!
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: [GMCnet] Blower motor quit [message #343844 is a reply to message #343842] |
Sat, 01 June 2019 20:15 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Deb
Check the ground wire as it can loosen . Must be tight as the case is
plastic
On Sat, Jun 1, 2019 at 5:55 PM Deb McWade via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Well on the first trip of the summer just got to my destination after 5
> hours of driving and the blower motor just quit. Checked the fuse box n the
> panel and its good. Is there is another spot that could have popped (a
> fusible link?). I found the main one i believe but not sure how to
> troubleshoot this blower.
>
> Of course its hot. Would be very nice to run the fan while we drive. The
> dash ac was working although a bit puny. Ill be ok for the next 10 days
> since
> im basically parked. Only a couple of short hops before we head back on
> the 14th.
>
> Suggestions of where to look and what to check? Hope its something i can
> wrangle (i brought my tools) and not needing a new blower motor right away.
> I would love to be able to get home and deal with it then.
>
> Other than this the run down to Vancouver from Kamloops ( took Hwy 1
> through the canyon) was uneventful. She ran great.
>
> --
> Deb McWade
> Logan Lake, BC, CAN
> "Li'l Sister"
> '77 Kingsley, 403, EBL EFI;
> TZE167V101404
> It's Bigger on the Inside!
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Blower motor quit [message #343845 is a reply to message #343842] |
Sat, 01 June 2019 20:31 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Deb,
The HVAC blower is grounded only through a single wire under one of its
mounting screws. That screw goes into the fiberglass HVAC housing, so is
very prone to loosening. The first thing I'd do is locate that ground
wire, remove the screw, and either put a multi-tooth ("star") washer under
the wire, or at least clean all the surfaces well, before reinstalling the
screw tightly.
Ken H.
On Sat, Jun 1, 2019 at 8:55 PM Deb McWade via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Well on the first trip of the summer just got to my destination after 5
> hours of driving and the blower motor just quit. Checked the fuse box n the
> panel and its good. Is there is another spot that could have popped (a
> fusible link?). I found the main one i believe but not sure how to
> troubleshoot this blower.
>
> Of course its hot. Would be very nice to run the fan while we drive. The
> dash ac was working although a bit puny. Ill be ok for the next 10 days
> since
> im basically parked. Only a couple of short hops before we head back on
> the 14th.
>
> Suggestions of where to look and what to check? Hope its something i can
> wrangle (i brought my tools) and not needing a new blower motor right away.
> I would love to be able to get home and deal with it then.
>
> Other than this the run down to Vancouver from Kamloops ( took Hwy 1
> through the canyon) was uneventful. She ran great.
>
> --
> Deb McWade
> Logan Lake, BC, CAN
> "Li'l Sister"
> '77 Kingsley, 403, EBL EFI;
> TZE167V101404
> It's Bigger on the Inside!
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Blower motor quit [message #343846 is a reply to message #343842] |
Sat, 01 June 2019 20:39 |
Rob
Messages: 651
Registered: November 2013
Location: Victoria, BC
Karma: 3
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Senior Member |
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If the blower motor has failed - they’re cheap and easy to replace. I suspect the brushes in mine were stuck - but it was easier to simply change it. My blower motor looked OLD.
I replaced mine in about 15 min in the rain on the side of the road last December. If you need a hand - I can help and/or supply tools once you’re on the island.
Rob
Victoria, BC
76 Royale - Rear Twins/Dry Bath
> On Jun 1, 2019, at 5:55 PM, Deb McWade via Gmclist wrote:
>
> Well on the first trip of the summer just got to my destination after 5 hours of driving and the blower motor just quit. Checked the fuse box n the
> panel and its good. Is there is another spot that could have popped (a fusible link?). I found the main one i believe but not sure how to
> troubleshoot this blower.
>
> Of course its hot. Would be very nice to run the fan while we drive. The dash ac was working although a bit puny. Ill be ok for the next 10 days since
> im basically parked. Only a couple of short hops before we head back on the 14th.
>
> Suggestions of where to look and what to check? Hope its something i can wrangle (i brought my tools) and not needing a new blower motor right away.
> I would love to be able to get home and deal with it then.
>
> Other than this the run down to Vancouver from Kamloops ( took Hwy 1 through the canyon) was uneventful. She ran great.
>
> --
> Deb McWade
> Logan Lake, BC, CAN
> "Li'l Sister"
> '77 Kingsley, 403, EBL EFI;
> TZE167V101404
> It's Bigger on the Inside!
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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Rob -
Victoria, BC -
76 Royale - Rear Twins/Dry Bath
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| Re: [GMCnet] Blower motor quit [message #343847 is a reply to message #343846] |
Sat, 01 June 2019 21:50 |
Deb
Messages: 349
Registered: October 2016
Location: Logan Lake, BC
Karma: 2
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Senior Member |
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Thanks for the suggestions. The ground wire seems in good shape and i have no high fan either. Rob, i am on the island at noon tomorrow. I'll drop you a line when i get there. I appreciate the offer. Always happy to do the work if i know what to do. Just point me.
Cheers folks.
Deb McWade
Logan Lake, BC, CAN
GMC Alumnus
It's Bigger on the Inside!
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| Re: [GMCnet] Blower motor quit [message #343849 is a reply to message #343842] |
Sun, 02 June 2019 07:54 |
Marsh Wilkes
Messages: 155
Registered: January 2004
Karma: -3
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Senior Member |
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Bang the blower motor with a hammer, if it is a problem with the brushes,
the motor will often run again, for a while anyway. If it does, that shows
it
needs to be changed.
Marsh (rarely post) Wilkes
-----Original Message-----
From: Deb McWade via Gmclist
Sent: Saturday, June 01, 2019 8:55 PM
To: gmclist@list.gmcnet.org
Cc: Deb McWade
Subject: [GMCnet] Blower motor quit
Well on the first trip of the summer just got to my destination after 5
hours of driving and the blower motor just quit. Checked the fuse box n the
panel and its good. Is there is another spot that could have popped (a
fusible link?). I found the main one i believe but not sure how to
troubleshoot this blower.
Of course its hot. Would be very nice to run the fan while we drive. The
dash ac was working although a bit puny. Ill be ok for the next 10 days
since
im basically parked. Only a couple of short hops before we head back on the
14th.
Suggestions of where to look and what to check? Hope its something i can
wrangle (i brought my tools) and not needing a new blower motor right away.
I would love to be able to get home and deal with it then.
Other than this the run down to Vancouver from Kamloops ( took Hwy 1 through
the canyon) was uneventful. She ran great.
--
Deb McWade
Logan Lake, BC, CAN
"Li'l Sister"
'77 Kingsley, 403, EBL EFI;
TZE167V101404
It's Bigger on the Inside!
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
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| Re: Blower motor quit [message #343850 is a reply to message #343842] |
Sun, 02 June 2019 08:08 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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There are 3 connections inder hood that overheat from corrosion and /or high motor draw . Often this melts the connectors as a visual cue. They are
1) at blower resistor under driver hood on side of air box This is for speeds 1, 2, and 3.
2) high blower relay on firewall passenger side. This decides between 123 or Hi when engaged. Toggles alternator power direct to blower
3) Hi delay relay. Up over the high blower relay on 77-78. This was an add on patch for 77-78 and can be unplugged and patched around in 30 seconds without any wire cutting. No longer easy to find NOS so bypassing is best bet Just manually use 1,2,3 when selecting air position, then go to Hi afterwards
All the above connectors should be disconnected yearly and sprayed with a good contact cleaner like Caig D5. The spraying and exercise breaks through the oxide layer and increases conducitivity and thus less heat to melt connectors. This is not just a MH issue but plagued all GM of the era as they aged. They later went to improved weatherpack connectors.
Remove your fan motor and lightly oil both bearings with a zoom spout oiler and be sure it spins freely by hand. If you got to it in time it can be saved, but may need to be replaced. If hard to turn it will melt the connectors again.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] Blower motor quit [message #343854 is a reply to message #343850] |
Sun, 02 June 2019 16:40 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Part# 35588. 76-78
45587. 73-75
On Sun, Jun 2, 2019 at 6:09 AM John R. Lebetski via Gmclist <
gmclist@list.gmcnet.org> wrote:
> There are 3 connections inder hood that overheat from corrosion and /or
> high motor draw . Often this melts the connectors as a visual cue. They are
> 1) at blower resistor under driver hood on side of air box This is for
> speeds 1, 2, and 3.
> 2) high blower relay on firewall passenger side. This decides between 123
> or Hi when engaged. Toggles alternator power direct to blower
> 3) Hi delay relay. Up over the high blower relay on 77-78. This was an add
> on patch for 77-78 and can be unplugged and patched around in 30 seconds
> without any wire cutting. No longer easy to find NOS so bypassing is best
> bet Just manually use 1,2,3 when selecting air position, then go to Hi
> afterwards
> All the above connectors should be disconnected yearly and sprayed with a
> good contact cleaner like Caig D5. The spraying and exercise breaks through
> the oxide layer and increases conducitivity and thus less heat to melt
> connectors. This is not just a MH issue but plagued all GM of the era as
> they
> aged. They later went to improved weatherpack connectors.
> Remove your fan motor and lightly oil both bearings with a zoom spout
> oiler and be sure it spins freely by hand. If you got to it in time it can
> be
> saved, but may need to be replaced. If hard to turn it will melt the
> connectors again.
>
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Blower motor quit [message #344053 is a reply to message #343854] |
Sat, 08 June 2019 17:35 |
Deb
Messages: 349
Registered: October 2016
Location: Logan Lake, BC
Karma: 2
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Senior Member |
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Well this connector is the culprit. Rob Bailey helped me with this one. There are 2 under the passenger side hood. This one is in the power wire to the motor. When we bypassed it (direct from battery to blower) blower works fine.
https://share.icloud.com/photos/0rgsClClN4zCzEHfj08XVbP2Q
Anyone know if i can get a replacement or if they are long gone, what could sub for it?
Deb McWade
Logan Lake, BC, CAN
GMC Alumnus
It's Bigger on the Inside!
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| Re: [GMCnet] Blower motor quit [message #344059 is a reply to message #344053] |
Sat, 08 June 2019 23:39 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Call me and I can send you one, just pay postage.
On Sat, Jun 8, 2019 at 3:42 PM Deb McWade via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Well this connector is the culprit. Rob Bailey helped me with this one.
> There are 2 under the passenger side hood. This one is in the power wire to
> the motor. When we bypassed it (direct from battery to blower) blower
> works fine.
> https://share.icloud.com/photos/0rgsClClN4zCzEHfj08XVbP2Q
> Anyone know if i can get a replacement or if they are long gone, what
> could sub for it?
> --
> Deb McWade
> Logan Lake, BC, CAN
> "Li'l Sister"
> '77 Kingsley, 403, EBL EFI;
> TZE167V101404
> It's Bigger on the Inside!
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Blower motor quit [message #344062 is a reply to message #344053] |
Sun, 09 June 2019 07:21 |
Handyman
Messages: 229
Registered: April 2016
Location: The Netherlands
Karma: 2
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Senior Member |
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Had the same bad .... very bad connector.
I just removed it and connected the wires, using a pressed connection.
Now it works.
The only thing I am puzzled about, there is some kind of resistor, condensator on one end of connection to blower motor.
Mine was very loose, I pressed it in as much as I could, but........
Is that the way it is supposed to be ?
Bye Daniel
Daniel Jacobs, NL-USA 1977 GMC Eleganza II, Rebuild 455 (2019) 3.55 FD. FiTech and (Modified) FCC, Electric Pump, insulated GasTanks, 100A Alternator, APC, McDash, Schräder Valves + extern Fills, Ceramic Film, TPMS, FlexSteel Seats
[Updated on: Sun, 09 June 2019 07:22] Report message to a moderator |
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| Re: [GMCnet] Blower motor quit [message #344069 is a reply to message #344062] |
Sun, 09 June 2019 08:40 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Daniel,
That device is a capacitor, intended to suppress electrical noise
(primarily for your AM radio). It's loose because of the same problem I
mentioned earlier: A self-tapping screw driven into the fiberglass HVAC
housing. Move it to another, un-stripped hole. Be sure to clean the
destination area down to bare metal, install a star washer and
anti-corrosive electrical grease between the cap and the blower flange.
Ken H.
On Sun, Jun 9, 2019 at 8:52 AM Daniel Jacobs via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Had the same bad .... very bad connector.
> I just removed it and connected the wires, using a pressed connection.
> Now it works.
> The only thing I am puzzled about, there is some kind of resistor,
> condensator on one end of connection to blower motor.
> Mine was very loose, I pressed it in as much as I could, but. Is that the
> way it is supposed to be ?
>
> Bye Daniel
> --
> Daniel Jacobs, NL-USA 1977 GMC Eleganza II, Rebuild 455 (2019) 3.55 FD.
> FiTech and (Modified) FCC, Selector Valve and Electric Pump, insulated
> GasTanks, 100A Alternator, APC, McDash, Schräder Valves + extern Fills,
> Ceramic Film, TPMS, FlexSteel Seats
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Blower motor quit [message #344091 is a reply to message #344069] |
Sun, 09 June 2019 15:36 |
Handyman
Messages: 229
Registered: April 2016
Location: The Netherlands
Karma: 2
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Senior Member |
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Thanks Ken,
Will correct it ASAP as we return in September !
Bye Daniel
Daniel Jacobs, NL-USA 1977 GMC Eleganza II, Rebuild 455 (2019) 3.55 FD. FiTech and (Modified) FCC, Electric Pump, insulated GasTanks, 100A Alternator, APC, McDash, Schräder Valves + extern Fills, Ceramic Film, TPMS, FlexSteel Seats
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| Re: [GMCnet] Blower motor quit [message #344342 is a reply to message #344059] |
Wed, 19 June 2019 01:13 |
Deb
Messages: 349
Registered: October 2016
Location: Logan Lake, BC
Karma: 2
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Senior Member |
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jimk wrote on Sat, 08 June 2019 21:39Call me and I can send you one, just pay postage.
On Sat, Jun 8, 2019 at 3:42 PM Deb McWade via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Well this connector is the culprit. Rob Bailey helped me with this one.
> There are 2 under the passenger side hood. This one is in the power wire to
> the motor. When we bypassed it (direct from battery to blower) blower
> works fine.
> https://share.icloud.com/photos/0rgsClClN4zCzEHfj08XVbP2Q
> Anyone know if i can get a replacement or if they are long gone, what
> could sub for it?
> --
> Deb McWade
> Logan Lake, BC, CAN
> "Li'l Sister"
> '77 Kingsley, 403, EBL EFI;
> TZE167V101404
> It's Bigger on the Inside!
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
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Thanks Jim. Just got back from the island. Managed to track down a replacement and all is good. Blowing like it should 
Deb McWade
Logan Lake, BC, CAN
GMC Alumnus
It's Bigger on the Inside!
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