under dash on right side three bolts
2
troubleshoot the coolant on a 1999 oldsmobile intruge
Possibly faulty fan motor
behind the passenger side headlight, under the diagonal brace, you will see 3 black relays in a row attached to a black metal bracket. going from passenger to dirver, they are the fuel pump relay, the rad fan relay, and the AC relay.
Blown fuse? Bad switch?
12 volts
Remove the wiring harness from the back of your 1999 Cadillac Escalade radiator fan motor. Remove the radiator fan motor retaining bolts. The radiator fan will come off.
Plugged evaporator? Bad fan motor?
there is no fan belt. the fan is electric-motor powered.
That is cooling fan 1 control circuit malfunction. check out the fan motor, and temperature sending unit, fan relay, and fuse.
If the heater fan works on all speeds, then the blower motor, blower fuse, blower relay, and blower motor resistor pack are all good. If the fan runs but nothing comes out of the vents, you have a 'mode door' issue (which might include a bad control head).
bad fan or bad fan relay