Mechanic Help

[erikm1981]

My son’s truck battery is going dead every few days. Battery and alternator test good. I checked for parasitic draw and sure enough have about 1.62 being drawn while the truck sleeps. Go to pull fuses to try and run it down and multiple fuses will take meter reading down to zero. All info online shows only one fuse should make the stop identifying itself as the draw on power. I’ve got multiple so now what could be causing that?

[Texas Grown]

Maybe a direct short? What year and make of truck?

[erikm1981]

2012 Silverado half ton

[Johnny Dangerr]

My tracker will kill the battery. Put a solar panel on it and it helped till we have 5 cloudy days...

[SmTx]

How old is your son? Unplug the amp for the subwoofers

[Bassdeer]

Had something like this on a truck years ago, Never did figure it out, ended up hooking up a battery kill switch near the dash.

[erikm1981]

How old is your son? Unplug the amp for the subwoofers

For sure!!! I was the installer for that project and that was my first troubleshoot!!!

I tested each of the small fuses for draw and all show 0’s which doesn’t make sense with the first test of pulling the fuses to identify the draw… checked interior and engine fuses, only small ones I could hit with the multimeter.

so recap, with multimeter hooked up to series with battery showing milliamp draw it reads 1.62 which means something is pulling enough current to drain the battery. Start pulling fuses to identify where the draw is and multiple fuses cause the milliamps to drop within normal range….

hook battery back up test each individual fuse for draw and none of the smaller testable fuses show to pulling juice….

[toastie]

I had a similar issue with my daughters 08 Civic. I never could run it down, I took it to the shop and it turned out to be the AC compressor was failing.

[mooney_ag]

Any of the 12v outlets connected to anything? You likely have a short. Is there a second fuse panel? One on side of dash and one under hood

[tminc]

Beware,my 2012 chevy 1500 burned to the ground last yr.,short in the left headlight pigtail.

[91cavgt]

Did you wait after hooking the multimeter up for about 10 minutes to let the computers go back into sleep mode? If you don’t do this then you will get a false reading showing multiple circuits are pulling more than they should.

[erikm1981]

Any of the 12v outlets connected to anything? You likely have a short. Is there a second fuse panel? One on side of dash and one under
hood

nothing hooked up to any outlets and all fuses in both boxes were checked and nothing

Beware,my 2012 chevy 1500 burned to the ground last yr.,short in the left headlight pigtail.

I found that issue as well. Son said his drivers side headlight was out and found the connector melted.

Did you wait after hooking the multimeter up for about 10 minutes to let the computers go back into sleep mode? If you don’t do this then you will get a false reading showing multiple circuits are pulling more than they should.

yes sir let it sit for about 45 minutes before each test

[Big Lee]

Can you share which fuses you pull to get the draw to go away.

[Outdoor Man]

Do you live where there is a lot of squirrel activity?

[mooney_ag]

Get on alldata website itlll cost a little bit but you can down load all the wiring schematics to trace wires.