I'm currently running my 6 volt blower motor but have converted everything else to 12 volts. I did change my original heater switch to a 12 volt as the original would start to glow after about 20 seconds of running. Knowing that this is bad, I changed it out for 12v switch. I've been wanting to put the 12v fan motor in that I have on my bench (direct replacement supposedly) but just havn't done it yet. I'm about ready to though as I'm driving my truck nearly every day now and it is cold outside! My 6v motor is LOUD AS HELL! I think it is spinning at 5 time its recommended RPM cause there is some serious volume comming out of there as well. Question: Were you able to change out the motor without pulling the heater coil out? Second Q: I have the accessory power wire for my alternator connected to the back of my heater switch. Could this be the reason my heater spins so fast? My fan motor speed fluxuates with engine RPM (alternator output). Where else should I have that alternator wire connected for power when the key turns on?
