Hello all,

Just wanted to contribute to the sub-forum, as I spent a better part of three weeks troubleshooting, poking and prodding at my wiring harness as to why my Primary, and Auxiliary Fans were not functioning. The car being relatively new and unmolested.

I was determined to correctly fix and maintain the way the system was designed. What I found surprised me, and may help others in the future..

The biggest help for me, was getting ahold of the GM Firebird/Trans AM
service manual with all those pretty flow charts and diagrams, and slowly working through it.. a with a bit of time, a continuity tester and Fluke lead
me straight to a GROUND melted right inside the weather pack connector that disabled BOTH primary and aux cooling fans.






The amount of effort it took to separate that connector was significant, as to why the issue went from intermittent to completely non-functioning was apparent indeed. Hope this helps a few people, what looked like a perfectly fine weather-pack on the outside, was a hidden monster underneath.

 

I will try to scan up the troubleshoot flow charts, and harness diagrams in this thread.
It is about 18 pages of nothing but cooling fan diagnosis for all models.

 

Note: Grey is Green/White on the other side of the weather pack.

 

Yeah....GM did some shaky things with regards to wiring. Delphi weather pak connectors are only rated up to 20A max so at the very least they should have used 480 series (rated up to 40A) metri-pack terminals/connectors instead. As fan motors wear, they pull more current....GM should have known better.

 

Yup, I have seen that quite a bit. Grounds/connections are very important.

 

I probably should have posted up here before I began the repair, because I ordered the same
Delphi weathpak kit, with the "correct" crimpers! But, at least now I know there is the potential for failure,
even if I cannot see inside the darn thing.


Ill make good on my promise to get the scans up when I get the time!