A/c wiring diagram for 2006 jeep liberty sport

Check for battery voltage on the dark blue/yellow wire in the connector at the AC clutch with engine running and AC on. If no voltage, yank the AC relay and check for battery voltage on terminal 86 in the relay socket. If no battery voltage on that terminal, check fuse 21. If yes, check for ground on terminal 85 in the socket. If no ground, then PCM isn't commanding the AC clutch on. Check for voltage on the dark blue/yellow wire at the low pressure switch and good ground on the black wire. The PCM provides power to the low pressure switch which then goes to ground. The PCM is looking for a large voltage drop if pressure is above 34-38 psi. If pressure is below that, the switch will be open, so the PCM won't see a voltage drop and will prevent AC clutch operation. The high pressure switch should be closed at pressures below 270-330 psi

no idea to be honest earlier jeeps had then at the front of the wing down below as i remember ?? newer one would i imagine be in the electrical box under the bonnet near the battery

Could just be low on refrigerant, bad relay, or bad clutch. You can buy a can of r134a that comes with gauge to check refrigerant. You can swap the relay with the horn relay if refrigerant is good to test it.

sounds like you have either no power goin to compressor or comp. could be locked up.run a check by puttin selector on defrost it should kick in,if not ron a jumper from bat to compressor wire hook-up should make some noise if not clutch is probably bad if you definetly have coolant in it.you know ootherwise it wont

Hello, You have two switches which work off the pressure of the Freon. Both of these switches cut off the power to the compressor. One is for HIGH pressure and the other is for LOW pressure. Check for power at the compressor clutch connector harness while the controls are set and the engine is running. You may have power and a bad clutch.

When you say that the Freon pressure is good, does that mean the pressure is within the proper range? Too much Freon will make the HIGH switch cut off power and too little will make the LOW pressure switch cut off power.

The ideal amount(ozs) of Freon is what is recommended by the Manufactuer and it will provide a moderate amount of pressure of about 35psi-40psi. You can borrow pressure gauges, called Manifold gauges to measure your system at autoparts stores with loaner programs.

The low pressure side of the system is the one you use to induce the Freon to go into an empty system. You can bypass this switch by taking off the connector and putting a "U" shaped jumper into the harness and the compressor clutch should get power to LOCK up all of the time.

You can take off the switch connector at the compressor clutch and then check for power when bypassing the HIGH pressure switch if the LOW pressure switch does not make the system get power. Only, really only bypass the HIGH pressure switch with the clutch connector disconnected. The HIGH switch is there to prevent damage to all of the components from seals to lines to every piece of Freon hardware in the car. Bypassing with the A/C clutch disconnected will allow you to know if power is getting to the compressor clutch.

Finally, you can get FREE wiring and fusebox diagrams through Autozone.com. Just sign and register to their site and then you can print the documents for yourself.

Good luck with this repair and I hope my solution helps you.

Check fuses, if ok, then check for freon pressure, if low on freon, low pressure switch, will keep a/c compr. from coming on, so it don't get damage due to low on freon, recharge a/c system, if low and check for leaks.

Have you had the freon level checked. It might be low.

YOUR a/c compressor is cut on by the vehicle pcm(computer).pcm sends a signal to a/c relay to energize relay which sends power to compressor. Have you checke dall the fuses with a test light? last dodge i worked on had a blown horn fuse which powered a/c system also. block said nothing about this. here is a diagram

try the fuse,then the relay,then the wire going to the clutch on the compressor

dont!!! an you start to add freon, itll start to cycle the compresor clutch until within safe operating pressure and then it will hold clutch in constant. charge liquid(with can upside down). if wont take freon in this manner than your more than low on charge. running low on charge will quickly destroy pump, especiallt those old harrisons. the refrigerant also cools the compressor. good luck and wear gloves-