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dr914jr, Technician
Category: Chrysler
Satisfied Customers: 33
Experience:  I am a second generation Porsche technician and restoration specialist.
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We think the digital clock is draining the battery on our

Customer Question

We think the digital clock is draining the battery on our 1999 Town and Country. Is there a way to turn it off or disconnect it?
Submitted: 2 years ago.
Category: Chrysler
Expert:  dr914jr replied 2 years ago.

It is highly unlikely that he digital clock or its circuit is draining your battery as they draw virtually no current. Your best bet would be to test the electrical system for drains using the following procedure.

Firs of all, the key needs to be out of the ignition and the vehicle doors must be closed. If opening the hood turns a light on to illuminate the engine compartment, remove the bulb from the socket on the underside of the hood. Remove the cable from the positive battery terminal. Using a multimeter set to measure amperage, connect one multimeter lead to the disconnected cable and the other end to the now disconnected positive battery terminal. the reading on the multimeter is now showing you the amount of current that is being drawn from the battery. The hood light is removed and the doors are closed, so the interior lights are no longer drawing current. The only things draining the battery should be the clock, the alarm system, and the radio memory at this point. Now things get cool! Just remove the vehicle's fuses one at a time until you se a massive drop in amperage. This is a foolproof way to diagnose a battery drain and will save you some money for sure.

All that being said, the overwhelmingly most common battery drains in a car that modern would b a bad cell in the battery itself or an internal short in the alternator. If the alternator is draining the battery, the alternator will be warm wen the rest of the engine is cold. If the battery is the issue, it will probably never charge above 9v. Please feel free to ask if you need any clarification on these points. I know an explanation like this can become a bit much.