Oh wow, I bet that drives you insane. The only reason I can think of it doing that is if the door switch located in the lock mechanism has malfunctioned.
Chances are good that you will have to replace the locking mechanism, BUT, sometimes the electrical switch in the mechanism gets dirty and sticks.
This can often be
corrected by performing the following:
1. Thoroughly spray the door switches (on each door) with:
- Cleaning spray - clear the sludge out of the mechanism - electronic contact cleaner, carb, brake, etc
- Air, canned or even better, from a compressor
- Spray lubricant - Dry lube
2. Open and close each door several times to work the lube into the mechanism
This is usually sufficient to clean the electrical & plunger mechanism inside the door switch.
If this doesn't work, you could remove the door panel and do the spray treatment from the inside also.
If this doesn't work, the switch may have to come out for repair (see below), or replacement.
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