Wiring for ATX/MTX Radiator Fan Conversion

[Redline]

I just got the dual ATX fans to replace the bad radiator fan in my 95 MTX. Does anyone have a wiring diagram or any simple explanations for how I can wire this? I don't really need anything fancy, I just need it to work! Thanks!

 

[SHOZ123]

The ATX fans are two speed and the MTX are one speed. So the ATX fans have a ground terminal and two hots. One hot is for the high speed and the other is for the low speed.

If it were me I would use just the low speeds but that is up to you. Using your existing fan connector use the hot wire to trigger two relays, one for each fan. You can get a high amp rated relay and use just one but that gets expensive. Two cheap 30A cube relays are fine for each fan.

 

[Redline]

Actually, in the 93-95 MTXs the fans were two speed so I have a 3-prong connector with two hot wires. Does this make a difference in how I need to wire it?

 

[SHOZ123]

Actually, in the 93-95 MTXs the fans were two speed so I have a 3-prong connector with two hot wires. Does this make a difference in how I need to wire it?

One wire is for high speed and one is for low. Take your pick as to which one you want to use.