In need to make a fog lamp work- I have a live, a switched live, earth and then a line to the lamp. Stick that lot through a standard 4 pin relay and ?? I’m a bit dim. Just like my fog lamp.
Yep. A boggo 30A relay will do, although if the switch and cable can handle it, you could get away without a relay. Make sure there’s a fuse in the +ve supply. Also better to run a separate earth cable for the light.
Fog lamp should work though its own switch and only when the side/tail lights are on. Take a sidelight feed to one side of the switch. The other side of the switch to terminal 85 on the relay. Earth wire to terminal 86 on the relay. A fuse in the live feed wire to terminal 30. Terminal 87 to the fog lamp