Can somebody please identify this relay/module? 86 TA. Mounted on firewall just to the left of the brake booster. I dont know if this is a factory positioning for this. The weatherpack was ruined by the PO and was hard wired in. The relay/module has 5 pins, but 4 are being used on my car. The wiring colors are red, light blue, black and the ground (on mine), is black also. Please help.. Thank you

 

Update.. I just found out my harness seems to be that of an 88 car rather than an 86. So this was added to my car whenever that swap was made. Maybe this may help someone in helping me identify this part. Thanks

 

When you unplug it, what doesn't work?

 

With only one wire going into it. I don't see that relay doing anything.

 

Unfortunately, I cant answer that. I pulled the entire wire harness out of car for an overhaul, so I cant pinpoint that at the moment.


If you read the first post, there were other wires named that were involved with this relay.

 

Oh, sorry. I was in a hurry when I first saw it and only really looked at the pictures.

 

Could it be for MAP or Fuel pump relay? I don't know what you have for an engine.

 

Its ok.. I figured it out. Went on ahead and took the relay off and held it up to the sunlight at an angle and was able to get the part number off it. Its the TCC module. Thanks for your efforts fellas

 

OK , I'll bite.

What does a "TCC module " do and where on the TCC circuit is it?

Typical GM 700R4 TCC wiring shown


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