How to Wire Automotive SPDT Relays. Fog Lights Off with High Beams On. Power (12V+) to the fogs lights passes through the normally closed contacts of the relay (terminals 30 and 87a). When the coil of the relay is energized (12V+ from the high beam switch to terminal 86, ground on terminal 85), the. 3. You can connect the switch's power to the battery wire at the relay. If it is a 14 Ga. wire the single fuse will be fine. I did not know if the relay was going to be close to the switch. If the wire to the switch is smaller in size than a 14 Ga, a smaller fuse to protect that wire may be in order. 4.
Fog Light Control Wiring Diagram Manualzz. 12v Electric Guide For Camper Vans Rvs With Wiring Diagrams. 88light Reign 12v Led Dimmer Switch Wiring Diagrams. 88light Led Strip Light Kit Wiring Diagrams. Professional Wiring Harness Kit Loom For Led Work Driving Light Bar With Fuse Relay 12v 40a At Affordable S Free Shipping Real Reviews Photos.. The simple fog light wiring diagram with relay consists of two parts. The first part is the power source, which connects to the relay. The power source is typically a 12-volt battery, but it can also be a ground terminal or a power outlet. The second part is the wiring from the relay to the fog lights. This wiring includes the input and output.