I have a 91 Laredo and there is an electrical issue somewhere. Even with the key turned off and out of the ignition, the battery still draws power somewhere in the vehicle. I disconnected the negative side of the battery and used a multimeter to start checking the fuses to determine where the problem is... the problem is that only two or three circuits are good, all the rest draw power somewhere when the fuse is in...

Could this be an issue with ground? An issue with the ignition switch? An issue with the fuse block itself? Im am lost guys and I am tired of disconnecting my battery everytime I park to avoid draining my battery!

Please Help!! I am new to Jeeping and want to give my new toy a lift and get to wheeling but I need to get the vital things fixed first! Any ideas?!?!

 

Are you sure the alternator isn't toast? What's the milliamp draw with everything off?

 

yeah I have disconnected the battery while it is running to be sure it is not the alternator, that runs fine. The milliamp draw is .17 with everything off and the key out of the ignition. I have literally taken all the lights out of the cab because I was redoing my headliner anyway. So it couldn't be a cab light either...

Completely lost here =/

I also have voltage readings for every fuse individually. I made sure to document the numbers when I was checking the circuits last night.

 

Have you had the battery checked out? i assume you have but its possible that its just not holding much of a charge. Also, were you saying 17mA or 0.17A? Im not qualified to say what it should be. oven 170mA is only a 2watt draw and the jeep should be good for days or weeks at that rate.

 

I have a similar issue, I removed every fuse and it still has a bad draw..I will be following to see what the issue is..good luck my friend

 

Just to be sure those that are drawing power are meant to be powered at all times, which ones are they? Some circuits are supposed to be powered at all times, like the PCM, or an alarm. A stereo that was wired improperly will do the same.

 

i checked my 00 like you did. it was .014. 14 milliamps.
its not been messed with, no mods, stock, jfwiw.

 

You need to clarify what the means.
What scale was the ammeter set to when you did the measurement?
Does the battery completely discharge? If so, does it take hours, day, weeks?

If you indeed measured the current draw with the multi-meter in series (between) the disconnected battery cable and its battery post with ignition off, doors closed, no accessories on and it does turn out to be 17 ma., i'd start checking the battery out.

 

yea this is true, I would head to advanced auto and have the battery checked. It's a variable and needs ruled out. Could be garbage and not holding the proper charge.

 

14 is ok, 17 should be ok. .170, 170 is not ok. i got the 14 from manual somewhere.

get the reading correct.

 

I'm not expert, but I read somewhere the most parasitic battery drains stem from the alternator. If you are 100% that the battery, and alternator are good to go, then what I would do if it were mine, is every day/night when I was in for the evening, I would unplug a fuse at a time. When you can crank the vehicle the next day, you have the culprit.

 

Power seat?

My 91 has power seats on both sides. the switches are crap, and will stay powered on until the motor overheats. then it shuts off for a few minutes. then powers back on, ad infinitum.

 

Do you have keyless entry? They have constant power. If you have that, disconnect it and check for draw.