My door locks are woring by them them self,they unlock about ever 30 seconds or so,will also turn the interior lights on
On your year , the door locks and several other things are controlled by the Body Control Module (BCM). It is located on the passenger side under the dash. The is a panel to remove to acess it. It is black, and about 7" X 5" square and about 1 1/2" thick. Unfortunetly your car also has a problem with water leaking in on that side threw the cabin filter hole, that is located under the windshield wiper panel on the outside of the car. There is a trim piece that falls off the body and lets water enter. this needs fixed first. Remove the panel (black) there are 4 to 6 screws to remove ,plus the wiper blade arms. The trim piece falls down, fish it out and glue it back in place, over the cabin filter hole. Use RTV or a caulk type glue. Reassemble it. Also a good time to replace that filter. Now go to the BCM. once you get the panel off, 2 screws, You will have to remove the light/bracket that is there also. The BCM clips on to its bracket, so slide it off. Remove the plugs in the BCM and check them for corrossion, A soft wire/brass brush works great. Now for the BCM, this is very suseptable to static charge, so touch any piece of metal before you open it. The plastic case around the BCM will come apart, look at it you will see the tabs. One you get the cover off it will also have corrossion. use the same soft brush to clean it up. Don't scrub on it hard as you can clean things off that you don't want to come off. Once clean, reassemble the cover. Before I ptu the BCM back in place I get some plastic, thin like a trash bag, And wrap the BCM. Put it back in place and pull the plug wires down alittle below the BCM. So if water does get in there again the BCM is protected and the water will follow the wires down, instead of going into the BCM. Have question let me know Randy PS this is not hard to do and New BCMs are expensive and you have to get a new one reprogrammed, more money.
Jul 21, 2011 |
1999 Pontiac Grand Prix