I have a 94 bonneville SSE. 2 days ago it died while backing up. it had no fuel pressure and the door locks and power windows were not working. I had it towed to the garage that i work at, and the next day it fired right up, and the door locks and windows worked fine. I then ran it in the shop for two hours, wiggling various connectors, tapping relays, and could not get it to die. The only codes i can pull are prndl switch not working and egr pintle postion error (egr code has been there for the past year) I cannot find any tsb on this. I am assuming its the ecm since it is also the body control module, and the door locks and windows were not working at the time of the no start, but i have already replaced the ecm about 3 years ago. I was wondering if anyone else has run into this problem.

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My brother in law is having the same problem with his 94 Bonneville.

Does anyone have a diagram of where all the circuit breakres, fuses, and relays are located in the vehicle?

Any help is appreciated. Thanks

I decided to bite the bullet and throw an ecm in. Ran great for about 50 miles...then it died, exact same problem. It wasn't the ecm. After sitting for 3 hours it started again, ran about 30 miles and died yet again. Luckly i was at my girlfriends house so i stayed the night there and went out in the morning and it started right up, i drove it to my shop and let it idle all morning. It did not die. I did some reserch on Alldata and found out the the Passkey 2 system controls the fuel pump, locks, windows and various other components. After jiggling they key around while it was running, it died again. I then pulled the colum apart to access the lock cylinder and noticed one of the wires for the passkey system was frayed. I repaired it, put it back together and used my spare key because the chip in mine was worn down. I let it idle for 2 hours, drove it 50 more miles. and it did not die. After doing more reserch i found out that the when the passkey system doesn't read the right resistance in the key chip, then it goes into a lockdown mode to discourage a possible theif from trying different resistance values. I'm gonna do some more test driving in the morning, but i am 99% sure this fixed the problem. I will keep you posted if it did or didn't and i hope this helps someone

I'm the one that orginally made this post...I don't have any diagrams off hand but i can tell you where the relays, fuses, and circuit breakes are. There is a fuse/ circuit breaker center under the drivers side dash, a relay fuse center underneath the passenger side of the dash under the trim panel, there are 2 7 mm bolts and i think 2 push nuts, and there is a third relay/ maxi fuse center under the hood against the firewall. I hope this helps