Recently all electrical in the passenger door stopped working: power locks, power window, power mirror. Even the dome light doesn’t come on when the passenger door is opened. One mechanic said it was Driver door master lock module, another said it was short with ground. Any thoughts?

My guess is there may be a plug for the electricals in the door located in the door jam and the plug is loose. Try reseating the plug if there is one.

I would start with an exam of the schematic to see just how everything is related and what is possible.

There is a plug at both the Driver’s door and car body and passenger door and car body, both were seperated, cleaned and repluged. This didn’t solve the problem. We also checked the relays and fuses for the passenger door and that didn’t work either. Actually one Chevy dealer said it was the Driver’…

I assume that all the things you mentioned went out at the same time and if so that would point to a common point of failure in my book. While the dealer knows more about the car than I do, I don’t think that the master lock module has any control on the switch for the dome light and possibly the do…

Thanks for your input. Actually the problem was intermittant, then the door went completely dead and has remained that way.

You really need to look harder for a schematic. Schematics are the key to fixing a complex problem such as this.

I assume that the intermittent failure effected all the things you mentioned which still points to a common failure point and something like a loose connection or bad switch connection. I still don’t see how there could be a single switch involved, inside the door, that would tie to all these things…

To all that made suggestions, thank you. We have solved the problem, it was a faulty swith on the passenger door console. The panel that has the electric window opener and power lock switch snaps out of the door, there is a module below it that takes three plug in connectors. One of them was bad. A …

Glad to hear that you solved the trouble. The tech that told you about the module in the door was correct and you saved a lot of money doing this yourself. Thanks for the feedback. If you are go to keep this vehicle you should consider purchasing a factory service manual with some of the money you …

2002 Chevy Trailblazer electrical problem with passenger door

Maintenance/Repairs

Patrick_F August 14, 2010, 5:38pm 5

Noone seems to have a schematic for the 2002 model year. A local mechanic is leaning towardsa broken ground, based on the dome light not going on when the door is opened. The button, on the driver’s door, that stops all windows from opening is no longer working.

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2002 Chevy Trailblazer electrical problem with passenger door

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