Jproz1167

iTrader: (3)

this is a weird problem that popped up, the harness is a 87 trans am tpi harness, I was checking for power on the injector plugs, all of a sudden the fuse from the computers memory (by the battery) popped, now it seems like it's ground and always blows its fuse.

prior to this car wouldnt ruight and Im at a loss on why it all of a sudden did this, could my ecm have went bad

Baylisstic12

I'd suggest to start checking wires for bare spots. I had a similar problem with my #11 fuse (dome light, map light, floor lights, horn, etc,etc) Just checked all the wires and it ended up being the dome light wire.

83_1/2 L69

First, unplug the ECM, then try a fuse. If it blows, you have a bare wire. If it don't blow, remove the fuse(or un-hook the battery) then plug in the ECM and try again. If it only blows when the ECM is pluged in, the ECM is most likely bad.

Jproz1167

iTrader: (3)

well I tried a few things you said 83 1/2 l69 pulled on the harness in several areas and this memory fuse still has a grounding problem, I should have mentioned this harness was re-pinned to run a speed density ecm.

Anyways after the car was running for about 15 minutes it died, I checked the memory and sure enough it was grounded, I then yanked on several areas of the harness and nothing changed.

I then pulled the middle connector on the ecm this is what has the memory wire in it and the ground was gone, I plugged the connector back into the ecm and put a new fuse in and the car started right up and ran for about another 15 minutes and died. but restarted after doing what I just did.

does this sound like it is in fact the ecm causing this problem, almost and this will sound a little crazy just prior to it hitting 220 degrees it pops this fuse.

or could prior to 220 could a fan relay be causing this problem as the fan tries to come on.

thanks for your help

Jproz1167

iTrader: (3)

thanks for your help all

I figured it out, my fan wires came loose and were rubbing on one of the engine pullies, so as the motor reached 220 and the fans began to cycle they grounded out causing this fuse to blow.

I figure the 15 minutes elapse till the ground was gone because in that time the temp switch went below temp and took the ground away from the relays.