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Ignition relay harness wiring diagram needed?

Tiny
FTA826
  • MEMBER
  • 1989 MERCURY GRAND MARQUIS
  • 5.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 37,000 MILES
I recently purchased this car, and someone cut the ignition relay harness and all out and bypassed it. I have a new harness and relay, 5 pin, labeled 1-5. I need guidance on which wires go to which pin. I am having a hard time finding this on the internet. Any help would be appreciated.
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Saturday, May 6th, 2023 AT 9:57 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Sure, here are the ignition switch wiring diagrams and I have included a guide to help you test the connections.

https://www.2carpros.com/articles/how-to-check-wiring

Check out the images (below). Please let us know if you need anything else to get the problem fixed.
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Sunday, May 7th, 2023 AT 11:30 AM
Tiny
FTA826
  • MEMBER
  • 2 POSTS
The problem is that I don’t know which specific wires go to which pins on the relay.
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Sunday, May 7th, 2023 AT 2:33 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Yep, they don't show that only the color of the wires and then the relay only plugs in one way so you need to orenant the connector correctly to the replay before the wiring can begin. Thanks for the images and video it helps.
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Monday, May 8th, 2023 AT 1:24 PM

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