Heater and heater fan don't go on at all

The HI fan comes from the "HI BLO MOT" Fuse 53 (30amp) Located in the underhood fuse box- there is also a blower HVAC relay located in there. The LO and MED settings are ran though the HVAC relay to the Blower resistor pack(Below right side of dash) then to the speed selector switch on the dash. HVAC Blower Fuse D supplies power to the speed selector switch and is located in the right instrument panel fuse box located behind right side of dash.

interior fuse box lower dash drivers side , cover/lid will list the locations

There is a 50amp heater fuse, then a heater relay. Once power gets to the blower motor, the resistor and fan switch provides the ground circuit.

Hello! Coil of Heater Relay is supplied through Fuse "IG1 2" (10A)...Located in the Drivers Side Box...Contacts of Relay are supplied through "Heater Fuse (50A)...Located in Engine Relay Box...Blower Motor has a 2 wire connector with wire colors: Black/Yellow (Pin 2)...And White/Blue (Pin 1)...Pin 1=Ground and Pin 2=Battery when Relay pulls and contacts close...
The Blower Resistor Pack (Which fails often) controls the fan speed...BUT, there is a fuse inside the assembly...If it blows = No Fan...Located on the top of the heater/AC box and can be accessed through the Glove Compartment...Guru...Saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

open hood,look in main fuse box for blown fuses,or bad relays to heater fans. the a/c fan should come on only when you turn a/c on at the dash panel only. it has nothing to do with the heat. if the heater blower fans don't come on, then look in the main box[fuse] for a blown fuse also. otherwise the problem is in the heater control module.[where you turn on a/c and the heat] that panel has a different fuse location.under the dash drivers side or on panel on drivers door at the door jam[where the door shuts towards the front of car,under mirror,but inside] look for fuse panel there also for blown fuse. hope this helps,but if not,recommend you seek a pro.such as cadillac

You will need to replace the fuse located underneath the drivers side steering wheel. Flip the fuse box cover lid over and you will find a diagram showing where the heater blower motor fan is located. Pull the fuse out and replace it with the same number fuse.

I would try unplugging the heater fan and see if it stops blowwing the fuse.If so I would start by either replacing the blower fan or the blower motor resister which is located on the side of the heater box around where the fan is mounted.

hedgehog is a final stage unit located on passenger side deep behind the radio. Replace my batt before fiding the post. did my self and part cost about 70.00 bucks but area is very tight. The fuses 75 and 76 are located behind the glove box and very difficult to get to and see. I am trying to find the solution to that as we speak.

Check your fuse box to make sure the fues didnt blow. the fuse box is located on the dash on the driver side door.

There is a fuse panel under the dash on the driver's side and the maxi-fuse box is under the hood on the driver's side. If the fuses are good, it is probably the blower fan which is located under the dash on the passenger's side. (Behind the glove box.)