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Q: my doors lock by themselves seemed to happen afer a rain storm on 1998 Chevrolet Astro

my Astros doors keep trying to lock themselves, until it runs the battery down, I had to pull fuse to stop it , but now I can't manually open rear hatch doors. What should I do and where are the parts I need to check on? This happened to me on a rainy day when i had the rear hatch open loading some things. I tried to dry everything out for several days but problem has not gone away.
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I have replaced door lock actuators on these, you may have to remove all the interior door trim panels and disconnect the solenoids one at a time to isolate which solenoids are failing. Perhaps spray water from a garden hose on each door one at a time and see which on fails. Autozone have some popular workshop manuals for free on line once you register (for free) on their website or there is a company that independent auto repair shops "buy" their information from that offer a very reasonable service to do it yourselvers. You can get a one week subscription or year subscription very cheap. The information is year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... great quality information same as the professionals have ,much better than generic workshop manuals from parts stores, much cheaper than the factory manual try
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Thanks I will try what you said and will look into the repair information, I really appreciate your help. I am disabled and do not have much money to repair it, so i have to try and fix it cheap as i can...
I had the same problem, I sprayed WD40 on the rear hatch slide switches.There is one on each side of the rear
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