How does a 12V fog light relay work?

12v universal wiring harness kit relay fuse switch. Fog lights off with high beams on relay wiring diagram. Draw a diagram on plain white paper with wire gauge noted and colors identified. Learn what a relay is how it works and why you should use one. The lamps and relay harness are to be used only with 12 volt automotive. Use as reference only.

How does a dipper switch work on a fog lamp?

Run the Fog switch S2 wire to relay COM-right, and run the Dipper switch high beam wire to the relay coil. Then the Driving lamp takes power from the Fog switch and from the parking light circuit as original (same as the Fog lamp), and the Dipper switch only has to handle two headlights as original (plus the relay trigger).

What does fog switch to 1st position do?

Fog switch to 1st position puts power onto relay COM connecting through relay NC to power up the Fog lamp. e.) Fog switch to 2nd position adds power to S2 which triggers the relay. This disconnects the fog lamp and connects the Driving lamp.

What is the wiring diagram for a fog light?

When the coil of the relay is energized 12v from the high beam switch to terminal 86 ground on terminal 85 the normally closed contacts open interrupting 12v to the fog. 1 wiring diagram and users instruction. This is a general wiring diagram for automotive applications.

What do fog lights do in dense fog?

The fog lights are lights underneath the headlights that are designed to improve visibility in dense fog or rain conditions. They are meant to help the driver see the edges of the road when visibility is low.

When do you use Terminal 87 on a relay?

When the coil of the relay is energized (12V+ from the high beam switch to terminal 86, ground on terminal 85), the normally closed contacts open, interrupting 12V+ to the fog lights. Terminal 87 is not used.

How does a 12V fog light relay work?