Noticed my fan wasn't working and attributed to high temp relay and changed it. Temp seemed o.k. until the weather went into the 90s. Car was running hot, low speed fan not turning on. Swapped relays around, checked the 40A fuse and BEC, all are fine. I have jumper on the high speed fan and it did turn on the fan. Swapped out w/ 13/14 GT500 fan. This morning was 80* and drove 30 minutes w/ AC on to work and car temp stayed around 190*. Coming home w/ AC on, temp was 90* and 10 minutes from work car overheated. Added water, turned on the high speed fan and made it home. Temp stayed at 190*. I ran the car in the garage and high speed fan comes on at 218* and off at 208*, tried it multiple times. Fan does cycle on and off w/ the AC and/or defroster on. It does not come on at any other temp, so no low speed fan? Guessing temps in the tune are stock, it's locked so I can't see the settings. Any idea why the low speed fan isn't turning on?