Wagoneer L6-242 4.0L VIN M FI (1988)
Automatic Shut Down (ASD) Relay: Testing and Inspection
Relay Terminal Identification
The following is a list of the terminal numbers and what they are commonly connected to:
Terminal No.
Description
30
Has battery voltage supplied to it, and can be switched or have battery voltage at all times.
87A
Connected to terminal 30 in the de-energized position.
87
Connected to terminal 30 in the energized position, this supplies voltage to the operated device.
86
Connected to the electromagnet and usually connected to a switched power source.
85
Connected to the electromagnet and grounded by the ECU or a switch.
1.
A relay in the de-energized position should have continuity between terminals 30 and 87A.
2.
With an ohmmeter, measure the resistance between terminals 85 and 86. The ohmmeter should indicate a resistance value of 75 +/- 5 ohms
for resistor relays, and 86 +/- 5 ohms for diode relays.
NOTE: Not all relays have battery voltage applied to terminal 30, some have voltage applied to terminals 87 or 87A.
