I now own a beautiful 1990 Coupe Deville. This weekend after the car would not shut off. I come to find a 30 amp fuse in the fuse box which should of been a 30 amp breaker. The car had a remote keyless entry system install on it prior. Niether key farbs worked to turn the car off. I ended up disconnecting the negative battery terminal to shut the car off. After replacing the fuse, then realizing it should be a breaker. The car still will not shut off. When I remove the breaker the car will shut off when I turn the key off and removing it from the column. I have read the manual for what is tied into this breaker which my model doesn't have most of those options. The power seats work, the defoger seems to work. What baffels me is why the car will shut off without the breaker in place? But won't shut off with it in place? Any suggestions on where to begin on solving what caused the fuse to go and what it may have damaged in preventing the car from shutting off with the proper breaker in place? Thank you.

 

If everything works with breaker removed I would leave it out. Not all locations are used in every car. It's possible breaker is back feeding ignition causing condition. I have not seen this with fuse box I have seen it with connectors under hood that looked like the should be connected but in reality they should not have. Stuff like that can lead to several days of confusion.

 

Thanks Slowroll. :-) I have the same thought. Just worried what may pop up later that was effected by the fuse going. It heat from the fuse blowing, deformed the base of the compartment for the breaker spot.

 

I would get a factory service manual or subscription to alldata so as to have access service information should more troubles come.

 

Thanks for the heads up Slowroll. I will check into that.