1989 Mustang GT Illumination relay wiring - Ford Mustang Forums : Corral.net Mustang Forum
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post #1 of 2 Old 07-05-2017, 10:39 AM Thread Starter
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Red face 1989 Mustang GT Illumination relay wiring

Hi all , new member from CA. I need help with my illumination (day/night) relay wiring. Can someone please help me with the wiring schematics? Do i need the relay to complete my instrument cluster wiring. Thank you all in advance!!!

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post #2 of 2 Old 07-08-2017, 10:20 PM
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I'm not sure what issue you're having with your lights so I attached the troubleshooting chart also. Ford also released a bulletin with a note about the circuit that says "ISSUE: The schematic on page 61 of the 1989 Mustang EVTM incorrectly shows Circuit # 14 connected from the Day/Night Illumination Relay to the Instrument Panel Dimmer Rheostat. The Day/Night Illumination Relay should connect to Circuit # 19."

Hope this helps, if not let us know what's going on with it and we should be able to point ya in the right direction

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File Type: gif illumination troubleshooting.gif (34.6 KB, 9 views)

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