B2000 87 heater fan

I hope im in the right section, but I am having alot of problems with my heater fan, I got a new blower fan tested it and it works, as well as got a new resistor, but looks different then the original. One day i switched on the fan and got a smell of burnt plastic and it wouldnt work, so i replaced those items. I checked power at the moter wire and i have positive power but no ground, so i tryed grounding out the fan switch in the dash to a new ground but that didnt work, any ideas? is there a fuse somewhere i dont know about i checked everything in the dash fuse box. help would be great as winter is here thanks

Yes, you need positive voltage to the blower motor, and a ground connection. Are you saying that when you check voltage at the two-wire connector to the blower fan (with key on and fan speed control on) that you get positive voltage reading only when your voltmeter negative lead is on bare metal, and not the other wire in the two-wire connector? If so, I'd temporarily run a direct ground, like scrape off some of the insulation and solder a jumper wire to ground there, then wrap in elecctrical tape.

You're already getting positive to the blower fan (you say) so stop searching for a fuse that's bad, those would all interrupt voltage on the positive side. If you've got it backwards and you have ground in the 2-wire connector but no positive, then it's time to backtrack to find out where the positive voltage is interrupted.

If you get positive and ground to a blower motor, it either spins, or is bad. You can also test the blower motor directly by hooking it up with temporary jumper leads and using the battery. The fact that something smelled burnt means something is bad.

Also, when you spin the blower motor by hand, is it real easy and smooth to turn ?