So I thought I had solved my central locking issues!!!!

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So I thought I had solved my central locking problems. The background is that the door motors would neither lock or unlock from the alarm remote or the central button. I can hear and feel the Central door locking relay working but no movement at the doors.

I checked wiring - appears to be ok
I checked the door pin switches, all ok, and operate the cdl relay
I replaced the relay with 2 other known good relays, no change
Pressing the alarm button and the central lock button operate the relay ok - i can hear and feel movement.
I replaced the door motors - all worked correctly for 1 day so i thought I had it beat....

Yesterday no lock or unlock again, now the only thing I can think of is that the heat of the engine has some impact as the car was cold when everything worked. What could be the cause of the problem? is there an earth connection I should check that could be affected by engine or exhaust heat? All other electrics work ok and car runs well, smoothly and was a pleasure to drive yesterday except I couldn't lock it!

[myph]

Have you tried the button at the base of teh door, if thats not making contact then it will not lock.

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myph said:

Have you tried the button at the base of teh door, if thats not making contact then it will not lock.

All working fine at the door pin switches, so not that

[james12345]

I'd be interested to find out what this is - I had an issue where my central locking was not working at all, so replaced the relay under the dash top. All worked fine for a week or two, then stopped again!!! Haven't had the lid off the dash for a wiggle of the wires yet, but I'm going to try that next.

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james12345 said:

I'd be interested to find out what this is - I had an issue where my central locking was not working at all, so replaced the relay under the dash top. All worked fine for a week or two, then stopped again!!! Haven't had the lid off the dash for a wiggle of the wires yet, but I'm going to try that next.

Well after testing wires again, I'm getting all the right voltages at the connectors behind the doors so replaced the motors again, got a different brand this time. It's all working again, so hopefully this time it will last.

Once removed, both the door motors taken off are either stiff to operate by hand or locked in the extended position and imoveable. so looks like something has failed in them. It's all wired up properly so I'm going for mechanical failure in the motor gearing. The failed ones are euroline motors.