Wiring diagram for AC fan, 1995 Jeep Cheroke

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check wiring diagram for the 1995 Jeep Grand Cherokee radio?

I'm going to start from the beginning.
The blower motor gets power from the high blower relay and it is grounded thru the fan switch and the resistor. So you should have power on the pink white blower wire coming from the high relay to the blower motor. The orange black wire from the motor is ground going to the resistor and fan switch. The blue wires on the control panel are for the ac compressor.
The high blower relay gets power from fuse number 5 in the box. The blower motor is grounded thru the resistor and then thru the fan switch.
Photo courtesy of AutoZone.com

the AC compressor has a "shutdown switch" when not enough refrigerant is in the system run a wire from the

run a wire from the + battery cable to the compressor pulley switch with the engine running, ac on if the compressor clucth engages (turns) you have low refrigerant charge





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first check that the fuses are present, and not blown. Test all of the fuses. rarely a relay goes bad, but you could swap the radiator fan relay with the ac clutch relay to verify it's ok. Then check for power and ground at the connector for the fan motor with the engine on, at operating temp., and with the ac on. If you have at least 12 volts between the two wires on the connector, then buy the fan.

Locate the wires running off from the O2 sensor. There should be two. The black wire is the ground wire. The other wire, which may vary in color, supplies power to the sensor.

2 Connect the power lead to the corresponding connector on the chassis's wiring harness.

3 Connect the black, or ground, lead to the corresponding connector on the factory wiring harness.

3 wires, "how do i wire it" are simply explained. all universal 3 wire o2 sensors will have 2 wires one color, the other wire a different color. the 2 that are the same color are ground and power for the heater and it doens't matter which one is which. so ground to the motor, power from the gray wire on the fuel pump, or anywhere you want to pull 12 volts while the car is running. i have a dedicated fan relay that doesn't use the ecm and runs off the key, so thats where i went. the different color wire goes to the stock sensor wire, it's the signal.

check a wire diagram cause the fan motors receieve info from the ECT and talks to the ECM.
must check diagram for proper routing of power.

The pressure may have knocked the electrical connector on the fan motor. Re-seat it.
I doubt that the motor is burned-out.

If that doesn't work,
Disconnect fan motor connector and turn ON engine & A/C compressor.
Check for 12 volts at the fan motor connector. If it's there, the motor is burned-out. If no voltage at the connector, then replace the "cooling fan" relay in the fuse box under the hood.

Either radiator fan switch or AC system fan activate relay. Check fan switch or look for AC fan motor fuse. Wiring diagram would help.

There are two fuses for the fan. One is probably a 20 Amp in the fuse panel in the cab and marked "Heater". or "Heater/AC" The second is under the hood may be marked Heater, Blower, or Fan and should be 30 Amp. The one in the cab supplies switched 12 volts to the fan speed switch. The one under the hood supplies the 12 volts to the relay. The relay is normally energized by the 12 volts through the 20 Amp fuse in the cab and through the switch. I think you find that the fan has the normal speeds except for missing HI with the underhood fuse removed, and will turn off with the ignition that way. There is no hazard in operating it that way but you may want to replace the resistor/relay assembly before it gets too cold. The relay is a pretty trouble free device in most cases, maybe you can find a deal on a good one at a junkyard.

The whole idea with the relay under the hood started back in the Sixties believe it or not. There is considerable voltage drop in the wiring between the fan switch and the blower fan motor. By adding the relay under the hood right next to the motor, the voltage drop was reduced, both by the shorter wire, and by using heavier wire to boot. The motor gets really close to the full system voltage when the relay is closed. In your case where the relay keeps the fan running, it can drain a battery rather quickly too!