redknight1

So I've removed all the aftermarket wiring from the battery. There is still a 1 amp current being pulled from the battery cable that runs off and into the firewall when the truck is off, key removed. Any ideas where to look first before I start pulling fuses?

RichP9

the ecm pulls power for a while after the key gets turned off so it can properly shut down, how long are you waiting to check for the draw?

redknight1

like a few minutes

redknight1

i've checked like a day later and still a draw

redknight1

so this draw is coming off of fuse #21, cluster keep alive power. That fuse also controls the ac compressor, the windows, dome lights, instrument cluster, and radio. So the draw could be in any of those things.

Feathermerchant

It would be pretty easy to pull the dome lights as a test. With door open, pull fuse and see which ones go off and remove those.
Does it feed vanity lights too?

redknight1

yes, eliminated dome lights as the draw.

powerranger262

Do the same with the radio, unhook it and check again.

Feathermerchant

Yup pretty much process of elimination. Do the easy stuff first. Make a list and check each one off as you do it.

Aeromech

You can get to the connectors on the instrument cluster pretty easily once you pull the covers off. There's a lot of electronics in there.