Electrical system occasionally goes crazy

Asked by Aug 17, 2016 at 01:57 PM about the 2008 Jeep Liberty Limited

Question type: Maintenance & Repair

My 2008 Liberty sometimes just goes crazy while driving. for no appear-ant
reason the horn will start to sound, the wipers will turn on and the
transmission downshifts to low and won't shift, if you shut off the key all these
symptoms continue until you unplug the battery. I've had it to the shop twice
but they can't pin point the cause. anyone got a suggestion?

1 Answer

92,955

Sounds early stage BCM failure, I rarely recommend this, but you just may windup at the jeep dealer, they might have to replace the BCM and then reprogram it to your vehicles vin, or you might get lucky and they will be able to reflash your stock BCM. Note on later model vehicles, anything after 05 you never disconnect the battery without using a saver tool, if you do you can corrupt the programming of the BCM, and if it does start and run, none of the accessories will work.

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