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OEM Wiring diagram


New member
May 30, 2015
Does any one have a OEM wiring diagram for a 1991 VR4. I did a search for OEM Wiring here but didn't find anything. I only have a Eclipse manual that generally gets me by.

I was working on the wiring and lost tach connection. I read that the tach is the white wire on the power transistor. But that goes to the ECU and I have a rpm signal in my AEM so I assume I am good up to that point or there is another tach signal going to the dash.

I also want to use the high/low AC button to control functions on the AEM as the car no longer has A/C.

Appreciate the help in advance.


Well-known member
Sep 24, 2014
Indianapolis, IN
You can get to Service Manuals via the Service Manuals Sticky in the How-To archive.

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