1987 I have a battery drain, verified by checking key off amp draw. Don't know size of draw except it is more than 200 mA (thats max on my little multimeter so I get a 1 for over range) At the jump start junction block (distrubition post behind the battery) I can remove the double wired red circle connector and the over draw will cease. i have the FSM electrical manual but my ability to read it is limited. The wires I can remove to stop the overdraw is a big circut, it cuts everything off in the car, it's like the positive battery cable has been removed. I've of course checked all the easy stuff. One more clue, each time i disconnect the battery and reconnect it the AC (automatic electronic) is moved to the on position. I don't know if it has always done that. Is that the default pposition on a repower? Does anyone know? I know I'm gonna have to go downstream on this power distrubtion chart but if anyone has a clue that might save me form all the circut finding and checking I sure would like to hear it. BTW, I have read every thread on this forum on the subject and some were helpful but I remain stumped. I know I could pretty much solve the problem with a battery maintainer or a quick disconnect but I just don't roll that way. Thanks in advance for any help. Sorry this is so long.

 

Since your meter is limited below the apparent current draw, I would suggest you pull ALL the fuses in the fuse panel, and then, while monitoring the meter, install the fuses one at a time until you find your culprit.

Once you find the circuit with the load, refer to your FSM for that circuit and isolate the components from the circuit, and connect them one at a time until you find your excessive load.

BTW: Last time I had this issue it turned out to be a courtesy light in the glove box being on all the time. A faulty switch - replaced the switch and all is fine.

I highly recommend getting a Battery Tender (or equivalent). Battery Tender makes a little waterproof unit, about the size of bar of soap. The BTs are "smart chargers" in they have a microprocessor on board which tests the battery level, charges as needed, and then backs off to trickle/float when the battery is fully charged.

Keeping them fully charged is much better even than a cut-off switch, because without the little trickle charge, the battery electrolyte will react to the lead plates (lead sulphate) which effectively and continuously reduces the capacity of the battery. Even left disconnected, a lead/acid battery will deteriorate at a few % per month. The BT will prevent that. (The battery in my wifes 69 vert is 6 years old, and even on cold winter days, it cranks over vigorously, and that is with 11:1 compression too!)

There are other "smart chargers" out there too. Just be sure to get one of them, if not the BT, as a plain Jane charger will boil a good battery dry, and that isn't good!

P.