ASD Relay Wiring Diagram (PART 1)
NOTE: The above auto shut down (ASD) relay wiring diagram applies only to 1993, 1994, 1995 4.0L Jeep Grand Cherokee.
ASD relay troubleshooting notes:
- The auto shut down (ASD) relay gets power from fuse #6 (15 Amp) and fuse #15 (30 Amp) of the Power Distribution Center (PDC).
- The PCM activates the ASD relay and the fuel pump relay at the exact same time and thru' the same circuit (PNK wire).
- The PCM activates the ASD relay when the ignition switch is in the RUN or START position and the PCM senses engine RPMs (thru' the crank and cam sensors). If either sensor indicates no engine RPMs, the PCM will de-activate the ASD relay.
You can find the fuel pump relay wiring diagram here: 1993-1995 Fuel Pump Wiring Diagram (Jeep 4.0L).
ASD Relay Wiring Diagram (PART 2)
ASD Relay Wiring Diagram (PART 3)
ASD Relay Relay/Fuses Location
For a complete description of the relays/fuses of the power distribution box, see:
Where To Buy The ASD Relay
The best place to comparison shop and get an idea of how much your Grand Cherokee's auto shut down (ASD) relay cost (and how much you can save) is here:
Not sure if the above parts fit your particular Jeep Grand Cherokee? Don't worry, once you get to the site, they'll make sure it fits by asking you the particulars of your vehicle. If it doesn't fit, they'll find you the right one.
More Jeep 4.0L Test Tutorials
If this tutorial was helpful/informative, you can find a complete list of tutorials here: Jeep 4.0L Index of Articles.
Here's a sample of the tutorials you'll find there:
- How To Test Trouble Code P0135 (1996-2000 Jeep 4.0L).
- How To Test The MAP Sensor (1997-2003 Jeep 4.0L).
- How To Do A Cylinder Balance Test (Jeep 4.0L).
- Jeep PWM Fan Relay Test Troubleshooting An Overheating Condition.
- How To Test The Crank Sensor (Jeep 4.0L -1997-2004).