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Asked: Nov 30, 2008 - 01:14 PM
Status: Closed
wwalters
1997 BMW 540i needs a jump start everyday. What's wrong?
i have been getting booast everyday to start car, i got new battery,car was good for 3/4 days and back to the same,i did altanator test it was fine, do i need a light control module or should i have the altanato re-checked?????????
In Makes & Models > BMW > 5 Series In Maintenance & Repair > Electrical In Maintenance & Repair > Engine > No start3 answers - 153 days ago
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Answers
JC1978
Date: Dec 01, 2008 Time: 12:29 AM
IT REALLY COULD B THE ALTENATER, IT CHARGES THE BATTERY WHILE THE CAR IS RUNNING. ALSO CHECK UR POWER AND GROUND LEADS FROM YOUR POWER SOURCE TO UR BATTERY. THEY MIGHT TO B REPLACED, OR A LOOSE CONNECTION SOMEWHERE. ALSO GET UR STARTER AND SOLINOID CHECKED THEY COULD B BAD.
lokki
Date: Jan 29, 2009 Time: 06:29 PM
Another problem may be that you have a light or some electrical device that isn't turning off when you shut down the car. I had this happen on an Acura. The trunk light would stay on and drain the battery. So, if it's not the obvious - battery, alternator, loose battery cable, you should be able to have the electrical system checked to see if there's a current flow with the car shut off...Then you can start tracing the souce of the drain.Good Luck!
robert137
Date: Jan 31, 2009 Time: 11:45 PM
Sometimes a bad diode in the alternator can leak battery current to ground. after your car is shut off and cool see if your alternator feels warm. Also try disconnecting the battery cable to your alternator.between uses'see if it holds a charge
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