jumper wire from one relay to another, underneath the fuse box in the engine bay. this jumper made the aux fans come on any time the ac was on. i have been tempted to do this to my car as i have a 160 degree thermostat and my engine never reaches 190 degrees. if interested, i found the post on 3zc. it is on page 3 of the "Installation/how to's" titled "How to: Colder A/C temps for TT swaps and NA cars", if not disregard. good luck. https://www.300zxclub.com/showthread.php?t=216423