Wes Tripple

Hello, I have a 2006 Trailblazer LS 4WD. Two weeks ago my blow motor stopped spinning during a long drive. It will not spin on any speeds (1,2,3,4,5). I replaced the blower motor, tested the fuse, replaced the blower motor resistor, and then checked for a ground issue by running a wire from the resistor to ground. None of these have fixed my problem. I have confirmed that there is an issue that current is not getting to my blower motor for some reason. However, the ground seems to be okay, and the fuse is not blown. Could it be the switch in the dash? Could the switch have gone bad and not be giving current to the motor? Any thoughts and ideas greatly appreciated.

tech2

auto or manual system?
they are wired completely different

Wes Tripple

It is a manual system

tech2

verify these fuses are good:
-underhood fuse block fuse #35 blower fuse 40 amp
-rear fuse block under back seat #44 hvac fuse 30 amp

if both are good; find the blower resistor...unplug the connector to the resistor, turn the key to run, blower motor on high
-there should be battery voltage on the red wire and orange wire; do you have that?

BlazedBlazer

I've tried everything listed here and nothing has worked. Has anyone found a solution to this problem?

tech2

post the result of the check for power on the red and orange wires

this hvac module has diagnostic capabilities....did you check for body codes with a full function scan tool?

BlazedBlazer

I don't have access to the truck right now but when I connected the volt meter to it and the negative to the black wire I would get 12 volts. Also, I replaced the wiring and when the red and black wire (accidentally) touched, they sparked which shows they are live. I'm unsure where else to go ..


I do have an OBDII reader but only code the car throws is a P1400 which is unrelated.

tech2

code reader can't access body codes.

check both wires I have mentioned and report back.

Wes Tripple

So i fixed my problem by replacing the fuse under the rear seat. However, the fuse blows out every time I put the A/C **** on the 5-speed. So there is some issue with the sperate wire that attaches speed five.