| [GMCnet] Heater/AC blower troubleshooting [message #344728] |
Mon, 01 July 2019 14:55  |
Gerard Hickey
Messages: 53
Registered: June 2019
Karma: 1
|
Member |
|
|
Hello all!
A while back I purchased a 1976 Eleganza II and brought it back to
Seattle. When I bought it the blower for the in dash heater/AC was not
working. Actually nothing from dash controls seems to work.
In watching the emails go back and forth on this list for a bit, I read
about how the connections on one of the relays corrodes and causes the
connection to overheat. Well, that was the problem I found and yesterday
replaced the connector. I also found in cleaning the connections on the
relay that the connection going to the blower was corroded/rusted and
ended up grinding that back to bare metal on both sides of the contact.
After all that, I still have nothing working. I have ended up pulling
both the relay that had problems and the relay above which I think is
called a 'delay' relay. I am wondering if there is a good way to test
these relays before just replacing them.
Is there something else that I am missing? Yes, I know that I may still
have an issue with the blower motor being seized. I will have the RV at
my house this evening, so I will have more opportunity to work on the
blower and test a few more things. So I may have more info in a day or so.
Thanks for any of your thoughts.
--
Gerard Hickey / WTØF IRLP:3067/Echolink:529661
hickey@kinetic-compute.com DMR: 3102272
425-395-4554
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
| Re: [GMCnet] Heater/AC blower troubleshooting [message #344731 is a reply to message #344728] |
Mon, 01 July 2019 15:24  |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
Gerard,
If you have a 76, you should not have the time delay relay. If you do,
buypass it as most of us dealers have not found one to use and not always
necessary.
Try calling me for assistance like others that need help in a timely
manner.
On Mon, Jul 1, 2019 at 1:12 PM Gerard Hickey via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Hello all!
>
> A while back I purchased a 1976 Eleganza II and brought it back to
> Seattle. When I bought it the blower for the in dash heater/AC was not
> working. Actually nothing from dash controls seems to work.
>
> In watching the emails go back and forth on this list for a bit, I read
> about how the connections on one of the relays corrodes and causes the
> connection to overheat. Well, that was the problem I found and yesterday
> replaced the connector. I also found in cleaning the connections on the
> relay that the connection going to the blower was corroded/rusted and
> ended up grinding that back to bare metal on both sides of the contact.
>
> After all that, I still have nothing working. I have ended up pulling
> both the relay that had problems and the relay above which I think is
> called a 'delay' relay. I am wondering if there is a good way to test
> these relays before just replacing them.
>
> Is there something else that I am missing? Yes, I know that I may still
> have an issue with the blower motor being seized. I will have the RV at
> my house this evening, so I will have more opportunity to work on the
> blower and test a few more things. So I may have more info in a day or so.
>
> Thanks for any of your thoughts.
>
> --
> Gerard Hickey / WTØF IRLP:3067/Echolink:529661
> hickey@kinetic-compute.com DMR: 3102272
> 425-395-4554
>
> _______________________________________________
> 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:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
|
|
|
|
| Re: [GMCnet] Heater/AC blower troubleshooting [message #344784 is a reply to message #344731] |
Tue, 02 July 2019 14:58 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
|
Senior Member |
|
|
Gerald
This information might help you. I had posted this a long time ago. The delay relay is no longer available. You can get along without it as it just delays the opening of the flaps until the blower get up to speed.
The delay relay is the smaller relay at the very top of the panel. It has two leads - on mine they are brown and yellow and one has a male and the other a female terminal at the end of the leads. The leads are approx. 6 to 8 inches long. The female one connects to the male terminal on the lead to the blower motor. The male one leads to the short lead (purple on mine) that goes to the blower relay (terminal 1). If the delay relay burns out you can plug the male motor lead directly into the short female lead going to terminal 1 on the blower relay.
The blower relay (below the delay relay but above the horn relay) has 5 terminals. When the blower relay is mounted with the 5 terminals down, there are two on the left, one in the middle and two on the right.
On the back left side it is #3 which has a red/white wire that leads to a fusible link and that goes into the harness and connects to the red wire from the alternator to the center stud of the battery isolater.
On the front left is terminal #2. Mine has a dark blue wire that leads to the resistor package in the right side of the heater box.
In the center is terminal #1. Mine has a short purple wire with a female connector. The male lead from the delay relay plugs into this (on mine right now I have the blower motor plugged into this as my delay relay is bad and disconnected).
On the right rear is terminal #5. This has a short black lead that goes to a ground screw.
On the right front is terminal #4. This has an orange wire that leads to the heater controls on the dash.
Terminals 4 & 5 control the coil in the blower relay.
Terminals 1 & 2 are normally closed and operate the blower when in low or medium speeds.
Terminal 1 & 3 are normally open but when the dash switch is put in "high" or "max" it actuates the coil and the relay connects these terminals which give power to the blower directly from the alternator in order to get higher voltage and higher blower speed. At the same time it disconnects terminal 2 from the circuit.
Let me know if you have any questons on this.
Emery Stora
77 Kingsley
Frederick, CO
> On Mon, Jul 1, 2019 at 1:12 PM Gerard Hickey via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> Hello all!
>>
>> A while back I purchased a 1976 Eleganza II and brought it back to
>> Seattle. When I bought it the blower for the in dash heater/AC was not
>> working. Actually nothing from dash controls seems to work.
>>
>> In watching the emails go back and forth on this list for a bit, I read
>> about how the connections on one of the relays corrodes and causes the
>> connection to overheat. Well, that was the problem I found and yesterday
>> replaced the connector. I also found in cleaning the connections on the
>> relay that the connection going to the blower was corroded/rusted and
>> ended up grinding that back to bare metal on both sides of the contact.
>>
>> After all that, I still have nothing working. I have ended up pulling
>> both the relay that had problems and the relay above which I think is
>> called a 'delay' relay. I am wondering if there is a good way to test
>> these relays before just replacing them.
>>
>> Is there something else that I am missing? Yes, I know that I may still
>> have an issue with the blower motor being seized. I will have the RV at
>> my house this evening, so I will have more opportunity to work on the
>> blower and test a few more things. So I may have more info in a day or so.
>>
>> Thanks for any of your thoughts.
>>
>> --
>> Gerard Hickey / WTØF IRLP:3067/Echolink:529661
>> hickey@kinetic-compute.com DMR: 3102272
>> 425-395-4554
>>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
