Question about 2000 Jeep Grand Cherokee

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Tailgate and back window problems

Recently I found out that my tailgate and back window does not lock anymore when I set the alarm.

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You need to check that you have an electrical signal to the lock when the alarm is activated.Use a testlight/probe.Unplug at rear lock activating unit.hold test light to positive side and activate alarm,if you have a power signal the lock activator is suspect but also check that the mechanical part of the lock is free moving and not resistant to being moved.Does the central locking work on the back doors with the original system?If it does the problem is with the immobiliser.If it doesnt then the lock activator area would be the likely place to look for the fault.

Posted on Oct 15, 2008

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