Question about 2004 Chevrolet TrailBlazer

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Same issue no radio,windows, locks but dash board electric works

04 Trailblazer changed battery and suv won't start. no radio, windows or locks to work. dash board electric lights up

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Try unhooking the battery, turn key on, leave door open, then connect battery, start engine immediately. The battery saver module thinks it's saving your power!!

Posted on Jul 25, 2009

  • michelpaille
    michelpaille Aug 01, 2014

    Did not work but when key is on, my headlight is back. will touching the negative.

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04 trailblazer windows,locks dont work


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Next, check for grounding issues someplace easy to reach like the heated seat connectors.

Most dummy lights work by choosing the warning light path over the circuit path when the circuit path is higher resistance. Which may explain your dash warning lights.

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This could be a combination of electrical issues, although i feel that the timing is coincidence in this case. When the combination is elec. windows, wipers, and dome lights this is indicative of the GEM module located behind your radio. The GEM (generic electronic module) is an electronic body control module that regulates electrical flow through a number of accessories.

These factory module boards are notorious for acting quirky by failing to ground intermittently until failing completely. I would be cautious in replacing ignition switches, locks, etc. as the issue can be also compounded by corrosion of the main battery ground wire in the engine compartment and which can cause frying of your under dash wiring into the main wiring harness which can get expensive (i speak from experience having had the exact same syptoms). My issues were that these symptoms occurred only in full ON. When in key BACK ACC mode, they disappeared.

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Hmmmm, from what u say, sounds like everything is ok, but,Bad battery can run lights, radio, but trying to start, will make clicking noise. U jumped it to start, and it did, another sign of bad battery. How are the connections at battery? Tight and clean? No corrosion? Check wire to starter also to make sure it's ok. If all connections are clean and tight, I would recommend removing the battery, take to parts store for free check to see condition of battery (low charge, or if it's shot). If u jump start it, u can also have them check the alternator too (free). U indicate dash gauge @ 14, that should be good. Battery usually has a date 'thingy' on it that u peel off #'s to indicate when battery was purchased, does yours have the 'thingy?'

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It may be expensive to have someone fix. Electrical gremlins can be a pain to find. If you could locate the issue then it might not cost as much to get fixed. Start by looking at all the wiring you can for any rubbing or bare wires. Something is grounding and draining the battery. I've seen a wiring harness rub a bracket on the back of an engine until it shorted, causing all sorts of issues on a civic.

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