I'm just saying, even the biggest issues could be caused by little things like bad grounds, shorts to power, shorts to ground, and open circuits. You can't simply condemn the PCM
because your fans won't work without checking any wiring. I'm trying to stop you from wasting money on a part without getting other things tested first.
If you want to throw a new (or used working) PCM
in the car, then go right ahead. But there's a pretty good chance that it's not going to make your fans start working for you.
And he wasn't "my" student. I was in the class with him, he was a fellow student, and he should have gone back to the Basic Electric course, because he didn't even know how to check for voltages properly.
To diagnose your problem properly, you'll need a DMM
, and you'll need to get some wiring diagrams (I have a Hayne's manual for my car, it's not great, but at least I've got some wiring diagrams). Where I'd start is, like I posted in the other topic you made, check fuses. If there are no bad fuses, check your wiring diagrams and check all the circuits for the fans. You're going to need to understand the basics of electricity, and how to test for voltage drops and available voltage.
And even if you do find a bad fuse, something had to cause that fuse to blow, so you'd still probably be doing some testing to find what is causing the fuses to let go.
I don't see why you even thought the PCM
was bad in the first place. Your fans stopped working, but everything else is still working fine.