30 amp fuse in fuse box.
Check relay, fuses then control head.
Check the blower motors ground and power in the truck and the blower motors resister......
The heater blower motor is on the interior passenger side. It is kind of a round shaped housing facing the floor.
On the inside of the firewall, below and behind the glove box.
Right side under the dash.
check coolant level
It's located behind the glovebox, on the passanger side of the dash
Under the dash, far passenger side.
It's located behind the glovebox, on the passanger side of the dash. How hard is it to get to the fan motor?
The blower motor if failing and pulling to much current.The blower motor if failing and pulling to much current.
Inside the HVAC housing, under the dash on the passenger side.
check the blower motor resistor pack. should be firewall side of heater rectangular connector with 4 or 5 wires.