This is a fan control system for any 2 wire thermo switch system (mostly used in mk1 and mk2 cars without AC) includes 2 temperature options for fan control 70-77C or 77-82C. If you have a car thats prone to running hot even with a performance radiator, you will want the cooler switch, keep in mind that if you are using a Motronic or other closed loop fuel/spark control system you will want to make sure you can get your engine warm enough to make the closed loop system, otherwise you will be running around rich and fouling out plugs.
Install Is Easy –
Battery Power – Purple (use a fuse if you dont use the OEM fused wire)
Fan Power – Yellow – connect to the positive pole of your fan
Ground – Large brown to the Thermo Switch
Relay Ground – Small brown to the thermo switch