Car won't star ,I tr

Asked by Keyon Mar 27, 2021 at 10:48 PM about the 2005 Chevrolet Trailblazer LT 4WD

Question type: Maintenance & Repair

I have a 2005 chevy trailblazer LT4WD and sometimes I can
start it and sometimes I turn the key and everything loose
power. But when I jump it it start sometimes it doesn't. I
changed the air filter I cleaned the throttle and changed
every spark plug. I don't know what it can be can someone
please help me.

2 Answers
26,810

oilyspill answered 3 years ago

if starter motor won't crank the engine, when problem is ongoing, make sure battery has a full charge and battery cables/connections all good. Maybe problem with ignition switch? Note the diagram for trailblazer starter motor. Two voltage circuits at starter motor, one is hot all the time, comes from battery. The other circuit goes hot when relay is energized. The starter motor grounds through engine block. Any testing at starter motor make sure transmission is in park or neutral and parking brake is set. Vehicle can't move. Test for voltage and ground, when problem is ongoing. good luck.

Mark helpful
11,225

FJ4072 answered 3 years ago

Could be ignition switch. I'd also check ground G201, a ton of stuff grounds through this. https://www.youtube.com/watch?v=TefXuAlBEtg

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