My '97 DeVille will occasionally just die while driving along and is it frustrating! I have had it to the dealer who said there were no codes. They took it for a test drive and, of course, found nothing, but did charge me for an hour!
What mine does: Drive along at turnpike speeds -- total electrical failure and engine dies. Pull to side of road. Restarts just fine. Dashboard, clock, radio, trip odometer, Avg mileage -- all reset to zero! It is like someone completely disconnected the battery/alternator while I was driving along. This also happened a couple of times when I slowed down to make a turn. It happened when I bumped a curb. This morning, I went out, tried to start the car. Absolutely dead. Just like the battery was disconnected. I opened the hood, fiddled with the battery connections, moved a couple of wires. Did not really do very much. Car started right up! So, I suspect it is electrical and a loose or "going bad" something or other. The cranking was strong so I doubt it is the battery. The battery connections look good on the battery side. This is very sporadic -- happens maybe twice a week and randomly. There are no codes listed -- maybe they are zapped when the electrical disconnect occurs(?). Anyone have any ideas? Thanks! --Chuck
Also, I posted this elsewhere but it was suggested I post this in the electrical forum. Tonight, I was parked with the engine idling, talking on the cellphone. After about 5 minutes, the car just died -- same symptom. It would not restart immediately -- it was like the battery was dead. I left it for a minute and the electrical power came on/went off/came on/went off -- very weakly. I now suspect the battery (about 4 years old) is dying. I am surprised, though, that if the battery is dying, that it would cause the car to shut-off and all digital instrument cluster values to reset to zero! I would have thought with the engine running that there would be no electrical problems even if the battery were stone dead(?) -- I'll head to Sears tomorrow for a battery check/replacement. Sound reasonable?