The painless fan controller is a good one. I'm too cheap to pay for one and used a ford starter relay and one 30 amp relay to have it turn on with temp sensor activation and with A/C operation. The ford starter relay controls the main power flow to the fan and because the temp sensor is a ground circuit, I used the 30 amp relay to convert the ground circuit to positive power flow to the ford relay. The a/c activation wire is a positive power wire so it just gets wired directly to the ford relay. Hope that makes sense, it does in my mind.
Also, if you have a junkyard nearby, you can look for a Volvo fan controller. It is one of the best out there and uses the least amount of amps from what everyone says on here. I have one that I am going to be mounting in my FJ40 here soon and have played with it a little and it looks like it has two speeds as well. It is mounted to the fan shroud near the top and looks like two relays wired together and comes with its own bracket for mounting.
Don
Also, if you have a junkyard nearby, you can look for a Volvo fan controller. It is one of the best out there and uses the least amount of amps from what everyone says on here. I have one that I am going to be mounting in my FJ40 here soon and have played with it a little and it looks like it has two speeds as well. It is mounted to the fan shroud near the top and looks like two relays wired together and comes with its own bracket for mounting.
Don