Question about 2003 Chevrolet Blazer

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Code p1638 2003 blazer - 2003 Chevrolet Blazer

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Alternator F terminal circuit. Check your plug-in in the Alternator case. The field wire is not connecting. You could have a bad supply wire from the Ignition switch or a Relay.

Check with Autozone.com and register your vehicle for free wiring diagrams and fusebox layouts. Some GM vehicles use Relays or fuses in the charging circuit.

Posted on Nov 03, 2012

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Posted on Jan 02, 2017

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