Battery draw down
Thread Starter
5th Gear
Joined: Apr 2011
Posts: 5
Likes: 0
Battery draw down
Hello all, new battery (Exide) completely discharges overnight. Can hear (but not find) a relay or solenoid, somewhere near front of engine compartment, clicking when charged battery is connected or disconnected. Does anyone know what this mystery load could be ?
Safety Car
Joined: Mar 2005
Posts: 3,753
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From: Wisconsin
Melting Slicks
Joined: Sep 2008
Posts: 3,132
Likes: 799
From: Espanola New Mexico
The clicking noise is normal when you disconnect or reconnect the battery, I belive it is the headlight module and not the cause of your battery drain down problem. There is a video on the internet that shows how to take millvolt measurements across the fuses and a table with what those values mean in terms of current. There is only one other current drain that could be the cause, and that is shorted alternator diodes.
Race Director
Joined: Oct 2004
Posts: 12,860
Likes: 4,661
Melting Slicks
Joined: Nov 2014
Posts: 3,399
Likes: 1,339
From: Havre de Grace Maryland
If you have electrical knowledge and know your way around the instruments used to locate the cause of the battery drain , great. Me, should I every have this issue and not having knowledge or the desire to test lines/circuits, I have a negative battery cable on/off switch waiting to cure the problem that I will use. The only down side is resetting the radio stations that I never listen to.
These cars eat batteries. Except for the C5, I never had a car that I had to replaced 3 batteries in less than 15K.
These cars eat batteries. Except for the C5, I never had a car that I had to replaced 3 batteries in less than 15K.
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Le Mans Master
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I used gas on the alternator will running. Fix my draw that i could not pinpoint for so many yrs. Just wear a fire suit if ur going to try this. Do it at ur own risk
Race Director
Joined: Oct 2004
Posts: 12,860
Likes: 4,661
If you have electrical knowledge and know your way around the instruments used to locate the cause of the battery drain , great. Me, should I every have this issue and not having knowledge or the desire to test lines/circuits, I have a negative battery cable on/off switch waiting to cure the problem that I will use. The only down side is resetting the radio stations that I never listen to.
These cars eat batteries. Except for the C5, I never had a car that I had to replaced 3 batteries in less than 15K.
These cars eat batteries. Except for the C5, I never had a car that I had to replaced 3 batteries in less than 15K.
Last edited by grinder11; Apr 30, 2022 at 03:05 PM.