Always disconnect the ground lead from the vehicle battery before wiring any gauge. Classic Instruments' Amp gauge should only be used on vehicles with alternators rated at 60 Amps or less. Using an alternator with higher output capacity is dangerous and could cause a fire.. Fortunately it has an ammeter gauge in lieu of a voltage gauge and the temperature and oil pressure gauges are mechanical. To reduce the voltage of the fuel gauge you need to use a voltage reducer, different from a resistor.
![[DIAGRAM] 1952 Ford Customline Wiring Diagram](https://diagramweb.net/img/1955-ford-customline-wiring-diagram-2.jpg "[DIAGRAM] 1952 Ford Customline Wiring Diagram")
Connect the Purple / White wire of the wire harness to right turn indicator power. Connect the Blue / White wire of the wire harness to left turn indicator power.. Classic Industries offers a wide selection of Literature for your 1952 GMC All Models. Classic Industries offers Wiring Diagrams.