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1994 Jeep Grand Cherokee Laredo 4dr

1994 Jeep Grand Cherokee
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April 4, 2013, 11:32 am

Tina C

Question: Won't lock or turn alarm on

We installed a JVC radio that you can buy from Wal-Mart. Now the locks and alarm system won't work.

April 7, 2013, 9:23 am

Ron W
Expert Mechanic

The alarm and locks on that vehicle are controlled by the Body Control module. You may have tapped into an incorrect wire. Also if it has a factory amp (usually under the rear seat) and you fed that incorrectly the BCM may power itself down. Try disconnecting the radio and see if the alarm and locks start working again. If they do, it's in your wiring.

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