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Hi
The door locks have micro switches in them to detect if the door is closed, these sometimes (often?) fail so you'll have the situation you face now. Can't lock the car, & the interior lights stay on.
Unfortunately the switch is built into the lock, & can't be replaced. You have to replace the complete lock assembly.
A possible temporary fix is to spray the doorlock with WD40, this can help but the problem will usually become intermittent.
I hope this helps Nick
The door micro switches that also serves a housing for the locking mechanism have either failed or are stuck or worn out. This switches tells the ECU if the door is open (courtesy door light on) or off. It can be replaced buying the whole mechanism (VW OEM Part) or replacing the micro switch with equivalent switches (Non VW Part).
On some BMW's of this vintage, lifting the handle would actuate the heated locks. So there was a microswitch on the handle itself. There's also a switch on the door jam -- part of the striker plate, at least on my E36.
Ford door pin switches go bad all the time. The hard part is to figure out wich door is causing the problem. Scan tools can help with this by going into Body GEM module. once you know wich door it is, you have to get the part and take that door pannel off. the door pin is located on the latch assembly (they are not very easy to change without taking the whole latch assembly out- but is possible) this should deff fix your problem- remember-ther rear hatch has a door pin swich too- sometimes 2 or them
The door latch located in the door panel has a micro switch built into it assembly. It is what detects an open door. A new latch is about $150. If you could find a shop to replace it for you. You could also try buying some plastic-safe contact cleaner/lubricant and spraying the latch assembly out and opening/closing the door a few times to work it in.
PULL THE DOOR OFF MAKE SURE THE 2 LITTLE DOOR HANGERS ARE CONNECTED TO THE SWITCH MECHANISM IF IT IS. THEN YOUR SWITCH IS BROKE. GO TO SCHUCKS AND ASK THEM IF THEY CAN ORDER YOU A WHOLE NEW DOOR LOCK SWITCH ASSEMBLY. REWIRE AND TAA-DA!!!
You have a switch on your console that locks the headlights up without giving them power. Use that switch to leave the up and there a a few screws that hold the plastic cover around the lights, just remove the cover and there a a couple more screws behold that cover that hold the headlight in place.. Should take about ten min to do both sides.. Any questions feel free to ask
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