Shain, give me two weeks and I'll have posted my design for this very function. I have also worked out the system for the fan fail light which you need the stock wiring to be able to use. A microcontroller is a bit of an overkill IMO. A couple of comparators and some RC timers are all I'm going to use. It keeps things simple. Martin #1458 shainbrannan wrote: > Hello, > > I was wondering if someone had a diagram or a how to on how to modify > the fan relay so that each has it's seprate relay? I know a good > amount of people have had good look with this setup. Once i do this > then i could come up with a microcontroller setup to have a delay so > that the one fan comes on after the orgional, some sort of delay. > > - Shain > #10140