94 Jeep has a overnight drain on battery.

Tiny
WHITEMARKT
  • MEMBER
  • 1994 JEEP GRAND CHEROKEE LAREDO
  • 4.0L
  • V6
  • 2WD
  • AUTOMATIC
  • 127,000 MILES
What are the specifications of drain with engine off on each fuse terminal?
Wednesday, December 10th, 2014 AT 2:52 PM

2 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
95% of those fuses should have no drain at all. You shouldn't be checking it that way anyway. You should be checking total draw at the battery.
Here is the procedure.

You will need a digital ammeter and a jumper wire with clips on the ends to do this.
First rig any door switches so you can have a door open without triggering the interior lights and unplug the hood light. Remove one battery cable and attach the meter in series between the battery cable and battery post. Take the jumper wire and also attach it the same way. Leave the jumper wire on for at least 10 minutes to expire all the automatic timers. Now remove the jumper wire and read the meter. Anything over 50ma is too much draw. The way you locate this is to start removing fuses one at a time until the meter drops to normal level. This will be the circuit with something staying on. Determine what components are part of that circuit and check them individually until the problem is isolated.
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Wednesday, December 10th, 2014 AT 4:06 PM
Tiny
WHITEMARKT
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  • 2 POSTS
So if there are several circuits that have a draw, there are several issues to look into, correct. Normally, does that mean that there are malfunctions to say a ignition switch or maybe even a blower motor or a multiple of items.
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Thursday, December 11th, 2014 AT 8:26 AM

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