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I need to know what P1634 code on a cadillac means

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Posted on Jan 02, 2017

SOURCE: P1634 Auxiliary Heat Relay - Short/Open

Hi Larry, The scan is showing a fault. the auxiliary relay for the heat control has mal functioned and either the wiring, a fuse or the relay its self is defective. It could also be a short ciruit in the wiring. Regards John

Posted on Jun 17, 2012

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Hi Larry, The scan is showing a fault. the auxiliary relay for the heat control has mal functioned and either the wiring, a fuse or the relay its self is defective. It could also be a short ciruit in the wiring. Regards John

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