Heater Motor 1990 RRC

[ajtbussen]

I have a 1990 RRC with the updated resistors for the heater blower motor. When the truck is first started the blower motor will not run. After a short time it will run and operate as normal until the engine is shut off. Both relays for the circuit are good. I cannot find the ground for this circuit in my manual. Can someone tell me where it is? Any other Ideas? It's not very warm here.

Thanks AJ

 

[ptschram]

Did you replace the blower motor? Sounds like that's the problem, not just the resistor.

 

[ajtbussen]

PT, Please don't say that. The air conditioner fans act the same so I was kind of ruling the heater fan motor out.

 

[ptschram]

Anyway you look at it, it's gonna be difficult to troubleshoot without at least some disassembly.

Trust me, I feel your pain.

 

[az_max]

I'm next on the blower motor replacement. bearings squeal and last week it stopped running for a while. I'll wait til it's warmer to try replacing it. (and the a/c t-stat)

 

[kevin-ct]

I'm next on the blower motor replacement. bearings squeal and last week it stopped running for a while. I'll wait til it's warmer to try replacing it. (and the a/c t-stat)

Yep, my 92 has same thing, squealing like a pig until warm.

can't wait to have fun doing it. :ack:

 

[BentAxel]

I am on the list for blower motor, too. Did the heater core some time ago and felt too confident in the blower (cheap bastard) to replace. It quit a short time ago and winter is in full force. Oh goodie, another 12 hours or so and big f'n mess.

 

[ptschram]

My '88 decided that the blower would slow WAY down.

One of the things I was excited about with this truck was that the blower worked on all speeds...

 

[kevin-ct]

My '88 decided that the blower would slow WAY down.

One of the things I was excited about with this truck was that the blower worked on all speeds...

Paul, how many hours do you charge to do a blower motor?

 

[ptschram]

Paul, how many hours do you charge to do a blower motor?

Depends-eight to twelve.