have a "02 chevy trailblazer. r&r'd the altenator, lights or electrical surge

Asked by Feb 02, 2016 at 07:31 PM about the 2002 Chevrolet TrailBlazer LTZ 4WD

Question type: Maintenance & Repair

this is my daughters car. she is in Alaska and I am in Ms. her alt went bad.
changed alt and now have the electrical surge problem.  which was there
before alt died.

1 Answer

66,245

Sounds like an intermittent bad battery cable or ground connection. When you remove the battery from the charging circuit the alternator will go to full, unregulated, power. The battery, in addition to other things, acts as a stabilizer for the charging system circuit. HTH. - Jim

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