86 Electronic Climate Control

[First C4]

I think I have a relay problem, or a ECC problem. Occasionally the blower fan(interior) does not work in any setting at any temperature at any blower speed. I checked voltage to the blower fan at the fan and have 0 VDC. I do not have a schematic of the system so I am not sure if there are relays involved. I have read about checking codes but believe that to be associated with the later version of the climate control system. I am thinking if no relay is involved then the most likely problem is the control itself.

Suggestions, input?

 

[corvette66]

I have the REAL shop manual. Im looking for you, but right now all i have found is.....


On the back of the Climate Control head unit, there is a purple wire that turns into a red wire at some point. The red wire goes into a "A/C underhood fuse 5 amp" That red wire runs into a junction with a black/red wire. The black /red wire hooks up to the blower motor. So maybe that 5 amp fuse is blown

Other than that the only relay i see is.... A black wire out of the head unit runs into a defogger relay. An orange wire comes out of the relay and into a circut breaker 30 amp.

I have other schematics, so i'll look see if i can find anything else

best of luck

 

[First C4]

Well the blower works, so it is not a fuse...I dont think it is the defogger relay....The relay for the circuit breaker 30 amp most likely is not related to the blower intermittantly working, I think that would cause the ECC to be completely broken intermittantly. Looks like the ECC is the most likely part to be the problem.

 

[First C4]

I have the REAL shop manual. Im looking for you, but right now all i have found is.....

Where did you get the shop manual if I may ask...All I have is a haynes piece of SH*&. I really need to get my hands on one before they become REALLY hard to find.

 

[corvette66]

yeah

Hahaha i know what you mean about those haynes mauals, they are terrible, same with the chilltons.

I got the shop manual when i bought the car. But i have seen a bunch of them on ebay. They are really nice. They are probably 3 times the size of the haynes.

good luck with that 86. mines an 86, and the Overdrive is kill'n me. darn 4+3's

 

[First C4]

good luck with that 86. mines an 86, and the Overdrive is kill'n me. darn 4+3's

Ah, I have the auto...less problems.

 

[C4ME]

I signed up for www.ALLDATADIY.com. Good enough for the local GM deal so good enough for me and only $25 for a years subscription. You can add another car for $14. If you have a modern car, the document is updated at some period.