Gauge Cluster Wiring 4-Wire Harness Always disconnect the vehicle battery before wiring any gauge. Connect a fused, constant +12V power source to the Pink wire of the gauge harness. This is to power the clock and should not lose power when the ignition switch is off. Connect a good chassis ground to the Black wire of the gauge harness.. Wiring Diagram Interpretation and Troubleshooting Tips Interpreting and troubleshooting a wiring diagram for a 1966 Chevy truck's dash can be a challenging task, but with the right knowledge and approach, it can be done effectively.
Product Description 1966 Chevy Truck Wiring Diagram, Full Color Laminated, ea. C & K Truck.. Looking for a wiring diagram for your 60-66 chevy truck? Find all the information you need to properly wire your vehicle with a comprehensive wiring diagram, covering all electrical components and circuits. Get the wiring diagrams you need to troubleshoot and repair any electrical issues in your classic chevy truck.