Question about 2000 Chevrolet Malibu
Please help, just the third stop light working on malibu 2000 (the left and right don't work).
There are a few things that could be happening here. the easiest way i know to figure out exactly what it is involves some test equipment that you may not have, but it need not be expensive. because your high mount brake light works we know that the brake pedal switch is good. if you are certain that the bulbs in your brake lights are good then you need to see what it is they are not getting. they need ground and power, not getting one or the other. there is a splice pack that i can see on the wiring diagram, but it doesn't tell me where it is. the wire to your brake lights (stop lamps according to gm) is light blue according to the diagram, the turn signal lamp wire is dark blue. follow the light blue wire back from the taillight assembly and see if you can find the splice pack. there will be 5 light blue wires at the splice pack. once you find it you are going to need an assistant, or maybe a pretty good sized rock. brakes lights work with ign off, so do it that way, it's safer. get somebody to hold brake pedal down, or put the rock on it. now go to the splice pack and see what happens when you wiggle it or tap on it. if it makes the taillight stop lamps light you found the problem. if it makes no difference then on to the next step. now you need a volt ohm meter. you can get a cheap one, will work fine for what you are doing. they are available at car parts stores, and though i don't usually name brand names will say this time you can get one at harbor freight for less than ten bucks. with brake pedal off, set tester to ohms or continuity, take taillight assembly apart, remove brake light bulb, and test for continuity between a known ground (pretty much any exposed metal you can find on chassis) and bulb socket. the base of the bulb is the ground side, that's the part of the socket you want to test. you want continuity or almost no resistance. if you can't get that result, you have poor ground. if you find good ground, next test. now with brake pedal depressed, test for 12v between center of socket and ground. set the volt ohm meter to dc voltage in probably the 20 volt range, needs to be more that 12, that's what you will find if all is well. if you have good ground and 12 volts then you must have bad bulbs, or improperly installed bulbs. seems really unlikely. if you make it this far you really wanted to fix this yourself. wish i could make it simpler, but that's how i would do it, suppose it takes longer to tell than do. hope that helps
Posted on Jun 03, 2009
Check the turn signal switch the brake lights circuit goes threw it
Posted on Jun 03, 2009
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Posted on Jan 02, 2017
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