A/C Compressor Clutch Relay
Some relays have battery voltage supplied to terminal No. 30. Others have battery voltage supplied to terminals No. 87 or 87A. See Figure . In de-energized position, relay should have continuity between terminals No. 87A and 30. Resistance value between terminals No. 85 and 86 should be 70-80 ohms for resistor type relays, or 81-91 ohms for diode type relays.
NOTE:
Also see appropriate A/C clutch relay circuits tests in TESTS W/CODES - 2.5L
article in the ENGINE PERFORMANCE section.