Cutting radiator fan wires & Splice to ac fan to reach Radiator fan Side

[95Dsm22]

Is it possible to cut the wires to the radiator fan and splice them in to the ac one ? I wanted to do this because I have a slim fan and the stock radiator fan I have the switch on it messed up and the stock fans are pretty expensive and I have a slim one that I can just use ? And I wanted to know so I can attach it to the ac fan to make it longer to reach the other side

 

[jcastello214]

You could use any fan you want . So one of the fans is activated when the coolant temp sensor reads 210 degrees. It only turns on one fan. The other fan or "ac fan" only is activated when the AC is on. I have it in one of my dsms that when I'm driving hard I left the ac switch to manually turn both fans on and that's it. I don't have ac anymore but it's a good "cool down" button for the engine .

 

[Neil Van]

Ok, this is what I know about them. As to which wire is hot, it matters to whether what you have the two stock 3 speed fans (yes they are actually 3 speeds - not 2) and wiring or some aftermarket single speed fans which may have changed the wiring.

If stock:
(Note: the wire names are my own where hi/lo corresponds to the fan relay's hi/low name.)

Passenger side (radiator) fan wires are:
lo positive (+12V) = white/black (white with black stripe)
lo negative (goes to ground) = black
hi positive (+12V) = white/blue
hi negative (goes to ground on M/T, switched on/off to ground by the 5th radiator fan relay LO2 on A/T) = blue/green

Driver side (A/C) fan wires are:
lo positive (+12V) = blue
lo negative (goes to ground) = blue/black
hi positive (+12V) = blue/white
hi negative (goes to ground) = black

Interesting note: The stock turbo 2g fans have 3 speeds (not counting off) but only 2 speeds are used (why many people call them or think they are a two speed fan). M/T uses off, medium, and high on the radiator fan. A/T uses off, low, and high on the radiator fan. Both use off, medium, and high on the A/C fan. The ECU controls the speeds based on engine water temp, vehicle speed, and whether A/C is on/off.

The speeds are not obtained by voltage on a unique specific wire pair but rather voltage on wire combinations. Thus my wire names and their relay names are somewhat misleading. Low speed is voltage on one positive wire (either lo positive or hi positive) and one negative wire (either lo negative or hi negative) although most 2g dsm's use lo positive and lo negative. Medium speed is either voltage on two positive wires and one negative wire OR voltage on one positive wire and two negative wires (most 2g dsm's use the latter). High speed is voltage on both positive wires and both negative wires.

When people substitute a single speed after market fan they tie the positives together and the negatives together so it is always either off or on high speed.

If you want both fans to kick on as your radiator fans does. I am sure there is some way to wire the AC fan into the radiator fans wiring and it would kick on as the radiator fans does and not just for the AC. I hope the wiring colours help you out.