FORD MUSTANG WIRING DIAGRAM FOR 1987-1989 INSTRUMENT CLUSTER C251 INSTRUMENT CLUSTER 87-89 Instrument Cluster Connector Wiring LH Connector (C250) Pin 1 (LG/W) - Connect to "LEFT (+)" on the control box Pin 5 (R/LG) & Pin 6 (LG/R) - Splice the provided alternator load resistor between these. Then, the wire can be inserted into the previously unused connection hole on the plug. This process if much easier if you have an old harness from a 1990-1993 that comes out of the instrument cluster. The wires ne ed to be as long as possible (6-8 inches), and they can be successfully wire tapped and soldered to the factory 1987-1989 harness.
Where can I get 87 5.0 wiring diagrams? I'm putting an 87 5.0 into my 1967 Coupe. I need to be able to follow the 87's wiring to adapt it to the 67.. 5.0 Mustang Forums (1979 - 1995) 5.0L Tech. 1987 Mustang 5.0 Wiring Diagrams. Jump to Latest 15K views 4.. 1979-2017 Ford Mustang Diagrams & troubleshooting documentation. Aftermarket Part Reviews, General discussion about Muscle Cars. Search for: Mustang Fuse & Wiring Diagrams.. 87-93 Radio Wiring Diagram. Diff Rear End Torque Specs. Airbag Diagnostic Code Clear. 87-93 Fuse Box Diagram. Alternator Wiring Diagram. Belt Routing-Smog Pump/AC.