Use dedicated contact cleaners rather than abrasive paper on delicate switches. For bullet connectors common in British classics, a light coating of dielectric grease can prevent future oxidation.
Always work systematically from the power source outward. Start at the battery terminals, move to the ignition switch, and finally to the individual component. Keeping a laminated copy of your car’s original color-coded wiring diagram is the most valuable tool in your arsenal. Classic Car Electrics: Tips, techniques & step-...
Use a multimeter to check for resistance across old wires. If a headlight switch receives 12V but the bulb only sees 10V, the wiring or switch is acting as a resistor and needs replacement. Step-by-Step Upgrading Use dedicated contact cleaners rather than abrasive paper
Unlike modern vehicles with complex ECUs and CAN-bus systems, classic cars rely on simple point-to-point wiring. However, age is the primary enemy. Over decades, copper strands become brittle, and PVC insulation can crack, leading to parasitic draws or fire hazards. Start at the battery terminals, move to the