My 1993 ford taurus won't keep a charge.changed battery and altenator?

its the constant control module, about 300 bucks to find and install, had the same problem with mine, probably have to buy from dealer. My car would keep charged for about twenty minutes and then it would die, it did however keep a charge when driving. I'm almost guaranteed it is in face the Constant Control Module, also check scrap-yard, might find one for cheap. dont pay more than 15 minutes labour if you get smeone else to change it. its kinda attached to the battery. also when you turn off you car, listen to see if anything is still running, for me it was the fan. thats when i knew for sure.

Adam
January 2008

My first idea would be to disconnect the alternator by its cables and see if the battery holds its charge - however you say that its a new one so we'll forget about that - same applies to the battery. Obviously there is a circuit that is staying live when it shouldn't, and likely culprits are the interior lamps, and especially a glove box or boot lamp if there is one. You could disconnect each fuse in turn with everything turned off - a slight spark on reconnection indicates current flowing.

John
January 2008