How many amps does an auto AC clutch draw?
24-13) the clutch coil amp draw should be 2.0-3.9 amps with system voltage between 11.5-12.5V.
How can I tell if my AC clutch relay is working?
This test confirms that the interior A/C control switches are functioning. Now plug the relay back in and disconnect the two-wire feed at the A/C compressor connection. One wire should be “hot,” if not, the relay is not sending power to the A/C compressor. If it is, then the relay is functioning correctly and the A/C clutch is bad.
How do you test a / C clutch coil resistance?
Voltage Test: Remove the plug from the clutch coil and activate the A/C system by placing the selector on cold. Using the 20 volt setting on the DVOM, check for battery voltage at the harness connector. If the battery voltage is present at the plug, test the coil for resistance.
What are the wires in a clutch relay?
The relay in a typical A/C control installation has a three-wire connection. 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.
How do you check the resistance of a relay?
To check the relay coil’s resistance, take the multimeter you have and place it in the ohmmeter (Ω) setting and place the probe leads of the multimeter on the 2 terminals of the relay’s coil. It doesn’t matter which probe is placed on which terminals.
This test confirms that the interior A/C control switches are functioning. Now plug the relay back in and disconnect the two-wire feed at the A/C compressor connection. One wire should be “hot,” if not, the relay is not sending power to the A/C compressor. If it is, then the relay is functioning correctly and the A/C clutch is bad.
Voltage Test: Remove the plug from the clutch coil and activate the A/C system by placing the selector on cold. Using the 20 volt setting on the DVOM, check for battery voltage at the harness connector. If the battery voltage is present at the plug, test the coil for resistance.
How do you measure resistance on a relay?
Use the DMM or analog ohmmeter to measure the resistance across the load connections of the relay. The reading should be short (0 ohms) on an NO relay and open (infinite ohms) on an NC relay. Confirm the current carrying ability of the load connectors.
The relay in a typical A/C control installation has a three-wire connection. 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.