Elect.cooling fan over-ride

[95/GT/5.0]

Manual Fan Control Switch Installation
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The fan is controlled by the PCM and/or the Constant Control Relay Module (CCRM), when the EEC detects certain temperatures it will switch the fan to either it's low or high speed settings. The A/C will turn the fan to high speed when it is set to max.
But how can you bypass both the EEC and CCRM and install a manual switch to control the fan operation?

First you will have to disconnect the NEGATIVE battery terminal and locate the CCRM and a pin on its connector.

The CCRM module is located LEFT (you looking at engine) of the radiator reservoir/overfill bottle.

Now that you located the CCRM, remove the connector, you will need a 6mm socket to detach the connector from the CCRM housing.

5.0 models:
Locate PIN / WIRE #17 (GREEN with PURPLE stripe) on the connector, it should be easy to spot, the connector has numbers for each pin.

Next you will have to TAP a wire to #17, don't CUT THE #17 WIRE !!!, you could use a scotchlock connector to tap into it, OR REMOVE about 2 mm of insulation and wrap your wire to #17.

Get a second wire and connect it to a GOOD GROUND, now run BOTH wires into the cockpit through the firewall, choose a spot to install the SWITCH, connect the wires to each of the 2 switch terminals.

Now is test time, turn key to ON, and flip the switch......READY!!!



NOTES FOR 4.6L SOHC and DOHC
Hook into pin#46 on the PCM, that is located behind the passenger side kickpanel. Once you tie into that pin all you do is run it to the toggle switch, and run the other side of the switch to ground.
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I did this on my 5.0L So I can run my fan and cool down between rounds at the track .Only down-side is, you have to have the key on for the fan to run.With manual over-ride switch in the on position your cooling for will run on high speed.With the manual over-ride switch in the off position your fan will be controlled by the PCM as noted above.

Also helps in the summer time, extra cooling by running fan at high speed at all times.Just curious if anyone has tried this.It's the best and cheapest mod I've installed to date.