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Home » Public Forums » GMCnet » Keeping the smoke in- wiring and heater fan (Horn relay- ouch)
Keeping the smoke in- wiring and heater fan [message #320680] Wed, 19 July 2017 15:56 Go to next message
lqqkatjon is currently offline  lqqkatjon   United States
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
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Senior Member
Getting in the electrical mode to rebuild some electric and hvac items.

Had some smoking wires and a smoking delay relay on a coach, so I need to get my head around the syatem and what i need to replace, clean and fix to get the fan motor operating proper, and probably the ac clutch too.

Why is the "horn relay" so dang expensive???

I have read up on the sites, and have wiring diagram. My plan is to replace the fusable links, clean and if needed replace the ring terminals and then connector terms. Have a new delay relay to install and will replace the fan relay, and it is getting a new fan.

Now there is a "horn relay and buzzer" on the wiringndiagram and i belive i know what item that is under the hatch. I come up with a napa hr133? $85??? Ouch.

How often do they go bad?? Probably something i will just clean, or should i replace it??





Jon Roche 75 palm beach EBL EFI, manny headers, Micro Level, rebuilt most of coach now. St. Cloud, MN http://lqqkatjon.blogspot.com/
Re: Keeping the smoke in- wiring and heater fan [message #320682 is a reply to message #320680] Wed, 19 July 2017 16:58 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
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Registered: January 2004
Location: Hebron, Indiana
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Senior Member
IF it ain't bad, don't replace it. Doing a little preventive maintenance by disconnecting and polishing up some connectors is a good idea. Anti-oxidation grease and a few star (tooth) washers on some connections are a good idea also.

Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
Re: [GMCnet] Keeping the smoke in- wiring and heater fan [message #320728 is a reply to message #320682] Thu, 20 July 2017 14:52 Go to previous messageGo to next message
Keith V is currently offline  Keith V   United States
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Registered: March 2008
Location: Mounds View,MN
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agreed, replacing a working part with an unknown and probably vastly cost reduced part made by the lowest bidder is not an improvement.

________________________________
From: Gmclist on behalf of Ken Burton
Sent: Wednesday, July 19, 2017 4:58:32 PM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Keeping the smoke in- wiring and heater fan

IF it ain't bad, don't replace it. Doing a little preventive maintenance by disconnecting and polishing up some connectors is a good idea.
Anti-oxidation grease and a few star (tooth) washers on some connections are a good idea also.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

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Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
Re: [GMCnet] Keeping the smoke in- wiring and heater fan [message #320733 is a reply to message #320728] Thu, 20 July 2017 18:22 Go to previous messageGo to next message
BobDunahugh is currently offline  BobDunahugh   United States
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Location: Cedar Rapids, IA
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John. O'Reilly's has the perfect length, and correct 16 gauge fusible link. And YES. 16 gauge is correct to power all vehicle 12 volt other then house 12 volt. One of the wire eyelets need to be enlarged for one of the bolts. I soldered my ends on for a better connection to the wire. Bob Dunahugh 78 Royale
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Re: Keeping the smoke in- wiring and heater fan [message #320743 is a reply to message #320680] Thu, 20 July 2017 22:09 Go to previous messageGo to next message
Bullitthead is currently offline  Bullitthead   United States
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I replaced my dead horn relay with a standard format relay for less than $3.00 and got that infernal buzzer vanquished to the idiot zone where it was developed and implemented. Had to replace all the terminals on the wires due to corrosion from moisture combining dissimilar metals.

Terry Kelpien ASE Master Technician 73 Glacier 260 Smithfield, Va.
Re: Keeping the smoke in- wiring and heater fan [message #320752 is a reply to message #320680] Fri, 21 July 2017 00:14 Go to previous messageGo to next message
roy1 is currently offline  roy1   United States
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Location: Minden nevada
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Try rock auto for a toranado relay

Roy Keen Minden,NV 76 X Glenbrook
Re: [GMCnet] Keeping the smoke in- wiring and heater fan [message #320756 is a reply to message #320752] Fri, 21 July 2017 08:38 Go to previous messageGo to next message
jimk is currently offline  jimk   United States
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Location: Belmont, CA
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If you need help with parts call and we will help.

On Thu, Jul 20, 2017 at 10:14 PM, roy keen wrote:

> Try rock auto for a toranado relay
> --
> Roy Keen
> Minden,NV
> 76 X Glenbrook
>
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--
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
Re: Keeping the smoke in- wiring and heater fan [message #320790 is a reply to message #320680] Fri, 21 July 2017 13:52 Go to previous message
lqqkatjon is currently offline  lqqkatjon   United States
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Registered: October 2010
Location: St. Cloud, MN
Karma: 5
Senior Member
Thanks Jim, I have you in my phone. You have the same horn relay listed on your website for big $$'s too. Rockauto and there shipping is not saving anything, Looks like that is just what the OEM part costs, I can see some cheaper aftermarket alternatives, but I think we will leave the old one in place.

as for other wiring issues going on with that Coach, I think I have it narrowed down to the crappy job the PO did on some wiring as usual. I am hoping the harness we saved off another coach will match up with this 77, and I can get it back closer to stock. At least fix the poor connections that is starting to show itself now.





Jon Roche 75 palm beach EBL EFI, manny headers, Micro Level, rebuilt most of coach now. St. Cloud, MN http://lqqkatjon.blogspot.com/
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