1978 W123 300CD relays on LH fender well (US model)

[Mike D]

Just curious. What do these relays operate? The separate red/yellow wire has a fuse socket but no fuse is in it. The red/yellow wire leads back into the cabin to who knows where. Everything works so the red/yellow wire is a mystery. Maybe some dealer or after market add on for power to something?





If it is any help, after a bit of cleaning the relay wiring harnesses have the numerals "12" and "6" on the wiring looms. The individual wire is red/yellow/green striped.

[Idle]

These are very common relays and usually sell for less than $10. They normally go to the a/c system which was on all US cars but not on all rest of the world cars.