While performing the checks, do not leave the relay bypassed for any length of time because the A/C compressor is designed to cycle off and on, running continuously.Locate the air conditioner clutch relay by tracing the wire connection from the air conditioner compressor plug-in to the relay. How to fix car a/c - bypass the CCRM clutch relay - YouTube With the wiring plug still plugged in, touch the jumper wire to the hot side relay lug, from the controls as already identified and from the relay lug that feeds the A/C compressor. Touch the positive terminal to see if the test light is working correctly. Check the three wires again. Make a small 6-inch jumper wire and strip both ends. The relay in a typical A/C control installation has a three-wire connection. The air conditioning clutch relay transfers power, like a switch, from the interior A/C controls of an automobile to the A/C compressor, engaging the compressor clutch. Make a small 6-inch jumper wire and strip both ends. With the wiring plug still plugged in, touch the jumper wire to the hot side relay lug, from the controls as already identified and from the relay lug that feeds the A/C compressor. This test confirms that the interior A/C control switches are functioning. To determine almost all pictures throughout Ford … posted by means of wiringforums from September, 15 2017. This will bypass the relay and engage the A/C compressor and confirm that the relay is defective. One wire is a ground, one wire is the input from the interior control panel and switches, and one wire is the power feed to the A/C compressor clutch.Using a 12-volt test light, connect the alligator clip to the negative terminal on the battery. Compressor Clutch Not Engaging.) One wire should be "hot," if not, the relay is not sending power to the A/C compressor. With the engine running, turn the A/C control or switch to "on" at the dashboard. Unplug any relay terminal wiring with the interior car A/C controls in the "off" position. Check all three wires with the test light; with the engine running, the wires should all be inactive. Now plug the relay back in and disconnect the two-wire feed at the A/C compressor connection. Checking an A/C clutch relay is a process of eliminating possible connection failures. In most cases, the relay is mounted on the fender well or fire wall.
If it is, then the relay is functioning correctly and the A/C clutch is bad.To bypass the relay, plug the A/C back in. This will bypass the relay and engage the A/C compressor and confirm that the relay is defective. The wire from the controls should show "hot," but not the ground or the A/C compressor feed. This kind of image (How To Bypass Ac Clutch Relay? Return to the relay. To bypass the relay, plug the A/C back in. previously mentioned will be classed using: 1998 ford expedition air conditioning diagram, 2002 ford expedition air conditioning system diagram, 2003 ford expedition air conditioning diagram, . Return to the relay.