The title sums it up. I have a 99 Civic Ex Coupe and the power lock option does not work. I can physically lock the doors by hand so mechanically the locks work as they should.

However, if I press on the power door lock interior switch the doorlocks will not engage to the lock position or unlock.

I can hear the passenger side actuator (I assume) attempting to lock/unlock but it does not work.

I did some brief troubleshooting but need insight what to check next.

There is a 3 pin plug that routes to the driver side door power lock switch. I verified that the black wire has continuity to ground. In the meantime looking for a diagnostic flowchart...TIA

 

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