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