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2004 silverado 6.0l.resister keeps burning out.repaced 2x .went online was told to get dlr oe harness.2wks.later resistor burns out again.maybe i should get oe resistor.was told aftrmkt.resistor was an upgrade.did some probing with test light getting 12v all the time with key on or off @ harness.driving me crazy.blwr.mtr. checks out ok when 12v applied.

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Only a couple of things can cause this, if the resistor is obstructed and cannot cool properly it will burn out. It must have a clean path of air to it, check for leaves or obstructions. The other is a faulty blower motor. Even if it works, the armature can be worn out and shorting intermittently, drawing way too much current through he resistor. After this many resistor replacements, I'd probably just replace the motor.

Hope this helps,
Dave

Posted on Jul 04, 2010

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    Dave C Jul 04, 2010

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