No spark? I've replaced the crank sensor

1993 JEEP GRAND CHEROKEE

160,000 MILES • 4.0L • 6 CYL • 4WD • AUTOMATIC

PMARTIN237166

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I've replaced the crank sensor and the complete distributor from a running jeep and coil. i have tried to change computer. also, i left the original computer since it didn't work. Any advice and or wiring diagrams?

May 30, 2023 at 5:26 AM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.

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It sounds like the auto shutdown relay is bad here is the location of the relay and the engine and ignition wiring diagrams in the images below so you can see how the system works.

This guide may help as well:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

NOTE: The Automatic Shutdown (ASD) relay is installed in the Power Distribution Center. Relay location is printed on the Power distribution Center cover.

REMOVAL
1. Remove the Power Distribution Center cover.

2. Remove the relay by lifting straight up.

INSTALLATION
1. Push the relay into the connector.

2. Install the relay cover.

Check out the images (below). Please let us know what happens.

Images (Click to enlarge)

May 30, 2023 at 6:07 PM