auto locks malfunctioning. Dodge Caravan.

tom436

I have an 07 caravan that has an auto lock problem. When I drive in the rain, the locks start locking and unlocking rapidly for 45 or so seconds, then quit for a while, then start again. This continues even after turning off the engine and removing the key. Also, the lock on the passenger side sliding door will only lock or unlock manually. Is this a solenoid or door lock actuator problem? Thanks for any thoughts.

KCRam

Being that it happens only in rain/dampness, you either have a short or a bad switch that's getting wet from rainwater. If you're able to do this, you can probably narrow the location if, on a warm dry day, you can run a garden hose at just one door at a time with the engine running to see which door triggers the malfunction.

imidazol97

@tom436 said:
I have an 07 caravan that has an auto lock problem. When I drive in the rain, the locks start locking and unlocking rapidly for 45 or so seconds, then quit for a while, then start again. This continues even after turning off the engine and removing the key. Also, the lock on the passenger side sliding door will only lock or unlock manually. Is this a solenoid or door lock actuator problem? Thanks for any thoughts.

A friend had a Chrysler van which quit locking/unlocking with the power locks or the remote. It was the module needing replacement. But removing the ground cable from the battery for a few minutes would reset the module and it would work for a long time until it had another failure to operate.

You might try that, but the rain sensitivity makes me wonder if it's a bad connection at the module or at the battery. Some modules perform poorly with weak voltage. Check your cables for the corrosion, on both ground and positive leads. And how's the battery? Maybe you're getting low voltage due to a bad cell and higher load in rainy driving with AC, blower, headlights, etc., on.