Question about compatibility of ECM's for various years of D21 Hardbody's

bonzo1605 · Mar 23rd, 2006, 11:24 AM

I have an 86.5 4x4 w/ the Z24 in it. My wife took my truck to work yesterday. She left the lights on and drained the battery, no big deal right. Well her and another female tried to jump start the truck and in the process she reversed the polarity on the Truck's battery causing the ECM to start smoking. I took the cover off of the computer and the circuit board looks fine, no burns (on the top at least) and the wire harness' that plug into it look fine. My question is if she did fry the ECM do I have to find one specifically for an 86.5 or say will an '89 or even '90 and so on work just the same? LESSON HERE, DON'T LET YOUR GIRLFRIEND OR WIFE EVER DRIVE YOUR TRUCK!

Thanks,

Jeff

dvdswanson · Mar 23rd, 2006, 03:52 PM

if there's smoke... something went. ECM's don't use Camels.

veesix · Mar 24th, 2006, 12:25 PM

You did'nt mention, but did you get the truck started? I cant believe there isn't a 100amp fuse to protect the electrical system.

bonzo1605 · Mar 27th, 2006, 01:55 PM

No I never did get the truck started. Upon further inspection I found the cause of the smoke. Next to the on/off switch on the ECM there are 2 transistors and one of them was almost melted. I found a corresponding replacement at a local electronics shop and soldered that in, hooked the ECM back up and tried jumping the battery again (properly hooked up!) and the other transistor started smoking. Needless to say it's now in the shop. The wrench has said that the rest of the electrical system looks fine but the computer is shot (go figure). Hopefully this nightmare will be all over soon

dflw_99 · Apr 2nd, 2006, 07:28 PM

I'd like to comment on letting your gf drive your truck

well i was offroading and i got stuck,so i got another truck to pull it out. i told my gf to just drive my truck while i snatched her out. well when i pullled the truck out she never stoped and the hook came loose and before i knew she drove my 2000 fronty thur my fence and broke a t-post in the ground.

i was like wtf baby!?!?!?!?!?!?!?!?!