RAM 1500 Truck 4WD V8-5.9L VIN Z (2002)
Fuel Pump Relay: Testing and Inspection
ASD AND FUEL PUMP RELAYS
Fig. 1 Type 1 Relay (ISO Micro Relay)
Fig. 2 ASD And Fuel Pump Relay Terminals - Type 2
The following description of operation and tests apply only to the Automatic Shutdown (ASD) and fuel pump relays. The terminals on the bottom of
each relay are numbered. Two different types of relays may be used, (Fig. 1) or (Fig. 2).
Terminal number 30 is connected to battery voltage. For both the ASD and fuel pump relays, terminal 30 is connected to battery voltage at all times.
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The PCM grounds the coil side of the relay through terminal number 85.
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Terminal number 86 supplies voltage to the coil side of the relay.
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When the PCM de-energizes the ASD and fuel pump relays, terminal number 87A connects to terminal 30. This is the OFF position. In the OFF
position, voltage is not supplied to the rest of the circuit. Terminal 87A is the center terminal on the relay.
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When the PCM energizes the ASD and fuel pump relays, terminal 87 connects to terminal 30.
This is the ON position. Terminal 87 supplies voltage to the rest of the circuit.
