Car Starting Problems
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Cadillac DeVille
Batteries

Is there a contoller for the dome lights and cruise control that can cause the battery to drain?

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2011-10-18 21:11:27
2011-10-18 21:11:27

The most common reason batteries drain on cars is a bad diode in the alternator. The alternator will still test out good as far as power output goes. Try this: disconnect the positive cable(largest) on back of the alternator and then touch it back to the post you removed it from;( remember it is hot so don't touch it to a ground) if it sparks as you touch it to the same post then it is probably the alternator causing the drain.

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Are you sure you need the fuse for the cruise control. My cruise control wasn't working, neither were my brake lights. All 7 bulbs were burnt out. When the brake lights were replaced the cruise control worked.

It shouldnt. The cruise control senses by the switch on the pedal not by the lights.

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