SOURCE: 2003 Astro van - power locks & AC issues...
There is a vacuum line that goes from the vacuum reservoir (usually next to the bottom of the passenger side engine) up and across the top of the engine to connect on the driver side of the engine. The vaccum line cracks/leeaks and will not allow the vent vacuum actuators to function. Replace the line. Use a thicker wall buts same inside diameter rubber vaccuum hose. Probably under $5. People waste a bunch of time replacing the actuators, switches, etc. Its just the vacuum line and poor original placement/design.
SOURCE: The power lock (driver's side sliding door) on our
Take a look at end of door where latch is & post where the 2 meet when closed. Look for round metal button/contacts, about 1/2" in diameter. If you look close, they should line up to make contact with each other when door is closed. Take some fine steel wool (preferred) or fine sandpaper and scuff them up until you see metal is clean on both surfaces. Now try it, and let me know what happens.
SOURCE: Venture van power door problem
It sounds as though one of the proximity sensors is faulty. Also try giving the tracks for the door a good shot of white spray lithium grease. The door may be binding enough so that the emergency reverse is kicking in.
SOURCE: 2000 Astro van - drivers window only goes up a in increments
The motor is shot. It works a little and overheats, replace the motor . Same thing the the lock acuators. The are trying but have lost the power to move the locks. May as well replace them while the door is apart.
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