Turn it off. Disconnect the ground wire from the battery and connect a 12 v test lamp between the negative battery terminal post and the negative cable. If the test lamp light up even dimly then you have a draw. Have someone look at the...
This is a great test procedure. I'd replace the light bulb with a multimeter on Amperage instead of a light bulb, just in case there are multiple sources (not likely) you can see the actual power draw.
My money would be on the alternator.
Here is my thoughts on battery cables. It's a 91. I would and do build all my own now. It takes that out of the equation. Just a thought. And yes these things need good grounds. I myself ground the engine, frame and body with large ground...
I have a bunch of old fj40 stuff like driveshafts axle housings and transmission and transfer cases. Before I take this stuff across the scales anyone want any of it ?
No prices posted as it is just come get it and it you want to throw me...
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