Tinkerer
New Member
Thanks.Disconnect the negative cable from the battery, place a VOM between the battery cable and the negative battery terminal and set on mA to test for a parasitic draw on the battery.
Anything more than a few hundred milliamps is too much.
Remove fuses one by one and retest to see which fuse removes the draw.
You can download the PDF for your year FSM and use the electrical schematics in section 8W to further trouble shoot the source.
https://wranglertjforum.com/threads...ice-manuals-fsm-technical-documentation.4618/
I just did a drain (IOD) check as suggested using my Fluke multimeter. At first connection, something kept kicking in that drove it up to around 125mA intermittent (I didn't set peak hold), but after a while, it settled to a constant 37mA, which I tested for about 10 minutes. If the battery were to have the AH it says, that is over 60 days capacity.
The sparking when reconnecting sure seemed a lot more. I have a recording meter that can go inline and possibly measure it over days if it sits that long.
I guess either I have to do longer drives or somehow top up the battery regularly. This shelter in place stuff is creating havoc. On the other hand, it has been a long time since I went so long on a tank of fuel!