Ive had the mod done for a while now and all of a sudden the med speed wont kick on when i hit the switch. Those not familiar with the mod i have a switch mounted on center consel connecting to ecu. I also have no slow speed at all but med still kicks on just not by switch. I tested the switch and its good. ANY help would be appreciated, thanks

 

Ya know, a search might be a good idea. Try searching for "fan mod". You'll eventually find several threads where someone has already gone through the trouble to map out which of the 4 fan relays control which fan/speed, and what controls the relays (temp switch, EL module, etc.). That should be enough to figure it out.

 

Thanks ill do that.