1998 Chevy Astro Van with rear dutch doors and window.. There is no power going to the lock actuator on the rear window. I removed the actuator (solenoid motor type) and verified it works by connecting +12vdc.. all the other locks including the locks to the rear dutch door work. any ideas or source for wiring diagram. I have not found any diagrams for the dutch door/window arrangement.. fuses seem to be ok, but not sure which fuse connects to this. Im not sure exactly how the rear window solenoid type motor is actuated. but the wiring seems to go to the front of the van and is not connected to anything else in the rear window area.

It wasn't a broken wire. There is an added relay for this dutch door option..located inside the rear passenger side panel.. the common and n/c contacts pass current to the window actuator when the key cylinder is pushed in, except when the door locks are initiated and the common moves to the normally open side, blocking current to the window actuator for some reason. The common and n/c contacts were evidently burned and open. I replaced the relay and all works now.

I found the problem by reverse tracing the wiring back to a faulty relay located in the passenger rear quarter panel.. then reverse engineering and making schematics. when the window button is pushed, current is passed between the common and the n/c side of the relay contacts.. These contacts were not making connection within the relay, most likely burned. The only purpose of the relay is to keep current from flowing to the window actuator when the door locks are being engaged. I suppose this is to keep the window from popping open while your trying to lock the vehicle and accidently push the key lock button at the same time. This arrangement is only for the dutch door option and I have not been able to find schematics.. I replaced the relay and all is ok now. Thanks for the info but I am a 40 year electronics tech and already eliminated a broken wire as a possibility. I found the problem by reverse tracing the wiring back to a faulty relay located in the passenger rear quarter panel.. then reverse engineering and making schematics. when the window button is pushed, current is passed between the common and the n/c side of the relay contacts.. These contacts were not making connection within the relay, most likely burned. The only purpose of the relay is to keep current from flowing to the window actuator when the door locks are being engaged. I suppose this is to keep the window from popping open while your trying to lock the vehicle and accidently push the key lock button at the same time. This arrangement is only for the dutch door option and I have not been able to find schematics.. I replaced the relay and all is ok now. Thanks for the info but I am a 40 year electronics tech and already eliminated a broken wire as a possibility.