My 90 Accord LX power door locks were not working for about a year until I fixed it recently.
Symptoms:
When pressing either left or right door lock switch, a "clicking" sound is heard from the drivers door area, but the door locks do not operate. This also happens when pressing down the drivers door lock.
What is happening:
The clicking sound are the relays switching within the power door lock control unit.
Solution:
Since the clicking sound occurs, it means a possible problem with the control unit. This needs to be confirmed. The power door lock control unit is located in the drivers door (for the 90/91 Accords). I had access to it when the window motor was being replaced.
Before removing the unit, disconnect the wire harness and perfrom the trouble shooting procedure:
http://www.honda.co.uk/owner/AccordM...400/16-228.pdf
If you follow the procedure, the door locks will operate. This means the power door lock control unit is faulty, but may not need replacement.
Remove the door lock unit pcb from the enclosure.
Here is the top side:
Here is the bottom side:
I have made some notes on the photo.
On the bottom side, there are some solder joints that are worn out, mostly where the white relays contact. Resolder those worn joints with new solder.
Examine all the solder joints for any other worn out ones.
Reconnect the wire harness and hopefully it should work. The troubleshooting procedure listed in the link should point what other compoent can be bad. The power door lock control unit costs $150, so try this before replacing it.
Let me know if it works!
Symptoms:
When pressing either left or right door lock switch, a "clicking" sound is heard from the drivers door area, but the door locks do not operate. This also happens when pressing down the drivers door lock.
What is happening:
The clicking sound are the relays switching within the power door lock control unit.
Solution:
Since the clicking sound occurs, it means a possible problem with the control unit. This needs to be confirmed. The power door lock control unit is located in the drivers door (for the 90/91 Accords). I had access to it when the window motor was being replaced.
Before removing the unit, disconnect the wire harness and perfrom the trouble shooting procedure:
http://www.honda.co.uk/owner/AccordM...400/16-228.pdf
If you follow the procedure, the door locks will operate. This means the power door lock control unit is faulty, but may not need replacement.
Remove the door lock unit pcb from the enclosure.
Here is the top side:
Here is the bottom side:
I have made some notes on the photo.
On the bottom side, there are some solder joints that are worn out, mostly where the white relays contact. Resolder those worn joints with new solder.
Examine all the solder joints for any other worn out ones.
Reconnect the wire harness and hopefully it should work. The troubleshooting procedure listed in the link should point what other compoent can be bad. The power door lock control unit costs $150, so try this before replacing it.
Let me know if it works!
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