2002 trailblazer battery

If this is for the illumination bulbs in the cluster, that would be the park light fuse in the fuse panel. This should be in a panel under the driver's side dash. At least, that is the set-up for earlier model GM vehicles.

2006 Trailblazer won't start - Discussion on Topix

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Sep 6, 2012 - My 2006 Trailblazer will not start, bought a new battery, still will notstart, not even with a jump. ... i get a jump i drive it and charged the battery it seemed fine but then i went ... Then, next morning, when I turn key, all lights come on and radio... back a day and 360$ well that pos still will crank but will not start. 02 trailblazer a/c problem
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Check for things like sun visor vanity lights that are left on and glove box center console lights, trunk light, underhood lights, 99% of the time that is the cause

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i have the same problem!

My line got disconnected. Can you end that chat and come online againn asking for another expert advice ..

Disconnect the negative battery cable and put a test light between the cable end and the neg post. If there is a draw, the light will light. Remember the doors need to be closed and the underhood light disconnected (these are draws as well). If the light is lit there is a draw. Removing fuses until the light goes out can pinpoint the circuit. Finding the actual short can tougher.

theres a draw somewhere. these are sometimes hard to pinpoint.start by checking that all lights turn off,glovebox underhood light all lights,you will need a meter to meter the draw amps, then with key off doors closed look at the draw amount,.02 to.03 is allowable, start removing fuses and watch if amps drop,one fuse at atime, start with this to try and pin down a location of the draw.hope this helps.

tire to turn your fog lights on , then your head lights.

your pigtail to the headlight might be burnt. I had the sme trouble on mine. Dealer sells them for about 30.00