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  #1  
Old May 13th, 2019, 13:55
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Power Door Locks- Unlock but Won't Lock

01 2 door XJ.

My power door locks switch won't work to lock the doors, but it will work to unlock the doors. I replaced the passenger side master switch a couple years ago when they wouldn't work in either direction.

Is this still a switch issue or is it more likely wiring?
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Old May 13th, 2019, 14:37
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Re: Power Door Locks- Unlock but Won't Lock

Some basic diagnostics with a $5 - $15 volts ohms-multi-meter should provide the answers. Check the voltage, check the continuity to ground, and test the switches and circuits.
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Old May 13th, 2019, 22:08
Heavyopp Heavyopp is offline
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Re: Power Door Locks- Unlock but Won't Lock

When I 1st got my xj I chased a power lock gremlin for a few days -- Sometimes the doors would lock, sometimes they wouldn't -- they would always unlock

Testers, pulling door panels, checking wires -- I just couldn't figure it out...

When it all finally came together I realized it was by design -- sometimes I had the key inserted in the ignition, sometimes I didn't -- spent days chasing the gremlin and all along it was the key in the ignition

So I'm going to say it -- Are you trying to lock the doors with the key in the ignition?
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Old May 14th, 2019, 06:23
Scrubber3 Scrubber3 is offline
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Power Door Locks- Unlock but Won't Lock

Can you hear the actuator engaging when you press the unlock button? Is so, are all of the doors not locking? Or just one?
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  #5  
Old May 14th, 2019, 07:54
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Re: Power Door Locks- Unlock but Won't Lock

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Originally Posted by Scrubber3 View Post
Can you hear the actuator engaging when you press the unlock button? Is so, are all of the doors not locking? Or just one?
I can hear it engage (albeit it sounds kind of weak) when I unlock, but not when I lock. It unlocks the driver, passenger, and hatch when I press unlock.
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Old May 14th, 2019, 07:54
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Re: Power Door Locks- Unlock but Won't Lock

Quote:
Originally Posted by Heavyopp View Post
When I 1st got my xj I chased a power lock gremlin for a few days -- Sometimes the doors would lock, sometimes they wouldn't -- they would always unlock

Testers, pulling door panels, checking wires -- I just couldn't figure it out...

When it all finally came together I realized it was by design -- sometimes I had the key inserted in the ignition, sometimes I didn't -- spent days chasing the gremlin and all along it was the key in the ignition

So I'm going to say it -- Are you trying to lock the doors with the key in the ignition?
Tried both ways, no difference.
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  #7  
Old May 15th, 2019, 05:07
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Re: Power Door Locks- Unlock but Won't Lock

The most common thing should be a broken wire in the wiring from the door to the jamb. Pull the door panel and hook up a volt meter selectively to each side and watch for the voltage change when the lock/unlock is engaged.
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Old May 15th, 2019, 13:21
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Re: Power Door Locks- Unlock but Won't Lock

There are two relay's in that design. One opens the lock the other closes it. Both should be located behind the kick panel on the passengers side. I would unplug both, reverse them and see if the problem moves.
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