Posted by Troy Rudolph on May 26, 1999 at 10:36:52:
In Reply to: Cold Start Relay for '80 528i posted by T Williams on May 25, 1999 at 21:39:00:
The high-speed circuit on the aux. fan is activated by 1) the 99 degree centigrade switch mounted on the radiator or 2) when power goes to the A/C compressor clutch to turn on the compressor.
I'll have to check on the cold-start relay.