Parasitic Drain? '02 Silverado 2500HD

Snails · July 24, 2014

Truck wouldn't start. Recharged the battery. Battery good. Truck started.

A couple of days later: Truck wouldnt start. Had battery checked. Battery bad. Replaced battery. Had alternator checked. Alternator good.

Tried parasitic leak test. 1.4A leak (varies between .6A and 1.4A). Pulled all fuses individually in main fuse box. No change in leak.

I need to check the interior fuse panel, but need to disable the door switch so as not to damage the multimeter.

Dumb question: Where is the door switch? I think I may be retarded.

Any other theories on what may be causing this problem?

Doug_Scott · July 25, 2014

I was told the functions that operate when the door is open would be too much for the meter to handle.

One of us is retarded.

Really, I think it is a matter of isolating the leak. If I have certain components operated when the door is open, such as the instrument cluster, I can't isolate the parasitic component.

A new user asking for assistance is not the one to be casting stones on his 2nd post. I will take this as my cue to leave you to your own devices. Good luck.

8.1HD/ALLISON · July 25, 2014

Take a screwdriver and push into the door latch to trip the door switch. The reason behind doing this is to keep the bcm asleep. If not the bcm wakes up when door is open and turns on interior lights, etc causing more if a draw.

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Snails · July 25, 2014

A new user asking for assistance is not the one to be casting stones on his 2nd post. I will take this as my cue to leave you to your own devices. Good luck.

I apologize doug_scott. I was referring to the guy that gave me the advice or me for listening to him.

gmtech4 · July 25, 2014

its a draw,,,,,,not a leak ,,,

door switch is IN the latch

a scanner can shut down the BCM ,,,,you will have a hard time with this sir from what ive read so far ,,,,,,i suggest a technician with service information ,,,,its not a beginner job sir

my 2 cents

Doug_Scott · July 24, 2014

Can you explain the part about having to disable the pillar switch to protect your multi-meter?

Snails · July 24, 2014

I was told the functions that operate when the door is open would be too much for the meter to handle.

One of us is retarded.

Really, I think it is a matter of isolating the leak. If I have certain components operated when the door is open, such as the instrument cluster, I can't isolate the parasitic component.