Parasitic drain

2001 FORD RANGER
260 MILES • 2.5L • 4 CYL • 2WD • MANUAL
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PPCAYER
  • MEMBER
  • 3 POSTS
I have a parasitic drain on my truck listed above 186 mv and I think i traced it to GEM module.

How can I test the module or what happens on the circuit board? I think I have two parasitic drains. one on the battery saver relay and the other on the lamp relay

No power windows or door lock or keyless entry.
Nov 3, 2021 at 5:17 PM
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JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 110,190 POSTS
Hi,

As far as testing the GEM, the can-bus needs scanned. CAN stands for controller area network. Basically, all computers/modules are tied together via a few wires. This type of scan will retrieve codes related to the GEM. These codes will likely start with a B and not the traditional P.

Here is a video showing how this procedure is done:

https://youtu.be/InIlnsjOVFA

Let me know if that is something you can have done. Also, as far as the module, there is a printed circuit board in it which can fail.

Take care and let me know.

Joe
Nov 3, 2021 at 8:53 PM
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