This is for an Isuzu Wizard UCS69. Trying to fix a an inoperative blower fan. Over the weekend I put a multimeter on the hot side of the fan plug and it was reading about 9.5v...I then connected up a ground directly to the other pin (bypassing relay/resistor/switch) thinking I would have at least some power going to the blower for it to run but it didn't. I tested the fan operation directly to a 12v battery and it burst into life, so assumed the fan was good.
I then connected up a 8gauge wire with a 15a fuse direct to the battery and the earth running to a switch then grounded. This worked well for a while but after about 20 minutes, the fan started making a weird noise, followed by a burning smell, followed by it stopping completely and fried!
I know this isn't the most ideal way of doing things, but I would have assumed it could handle 12v (and up to 15v I guess). Am I to believe I have given the blower too much juice and it has crisped that way or a big maybe that the fan was on it's way out - any theories?
Should a blower fan connected directly to 12-15v battery still be able to run normally? This is what I thought the 'max' setting on the console would effectively be doing by bypassing the resistor.