Truck in my signature has an electrical short. This is what I've tried so far. I ran a test light in line on the neg battery terminal an got a bright glow from the light that starts to blink or flash after about 10-15 sec. I then went through my fuse block pulling each fuse and relay one at a time while watching the light and it never went out. Did the same with the fuse panel under the dash. Still nothing. I've had the alternator tested and both batteries and all was showing good.( Ive since charged the drained batteries and leave them disconnected so the don't drain when I'm not working on it.) I've also had the starter checked and it was ok. I've unplugged every aftermarket add on from the power sorce and nothing changes. I've also unplugged my power seat and that didn't change anything. I hooked a multymeter inline in place of the test light and it showed a .52 amp draw. I don't have an under hood lamp and my dom light isn't staying on, so I'm at a loss and need help and more ideas of what to check or how. Also the only time I saw a change in the light was when I pulled the passenger side dash cover and started unpluggin the electrical plugs one at a time. It was either the orange/cream colored plug or the black plug and the light seemed to dim slightly. Anyone know what those go to? Also I have burnt out dash lights could that cause an issue? I unplugged the cluster from the dash and that didn't change anything that I could tell. Any help or ideas would be great, I'm about to lose my mind over this and I miss being able to drive my truck without fear that I'll get stranded if the batteries get drained.
I unplugged the computer(s) and nothing changed. Ran the multimeter inline pulled the fuses one at a time, still nothing. This is getting old fast. I'm not even sure what to try next. I heard about the memory seats causing issues and the trailer brake box. I believe I've unplugged them and that didn't change anything either.