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.

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.

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.