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1990 pickup heater not working

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Old Nov 25, 2019 | 07:16 PM
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Teej99's Avatar
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1990 pickup heater not working

Not sure what’s going on with my heater system, All my fuses are good(drivers side floor, behind glove box, and hood), bought a new heater switch and have a working relay, sounds like the blower motor is working but I’m still not having any heat or any blower functions. Thanks in advance.
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Old Dec 7, 2019 | 12:20 PM
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From: Reno,Nevada
I had an issue kinda like this, turned out my heater core (hidden in the dash) was plugged. A real pain in the rear to replace the heater core.
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Old Dec 7, 2019 | 01:01 PM
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I don’t think my core is plugged, I installed a power cable from my battery to a switch to my blower motor and it works but for some reason i still don’t have power at my heater fuse. New switch, resistor, and relay, fuses good but no power.
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