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From Den052 auto mechanic

easiest way is to go to junkyard and remove part of the harness and maybe the switch if it is still good. Splice and replace as necessary. Keep in mind, check heater motor draws too much amperage and will burn out new switch. Usually the case!!!!!!!! Install new heater motor too (real common problem).

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Q: If heater wire harness shorted the heater switch what do you need to do?
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