heat exchanger water pump (PDF file)

[frydguy79]

who has rewired their intercooler pump to with a switch?
for cooling down between runs??

TG?

[Dactyl]

Originally Posted by frydguy79

who has rewired their pump to with a switch?
for cooling down between runs??

TG?

Water Pump is controlled by the ECU. In order to do this you would want to by-pass the relay for the water pump with a 20 AMP Mini Fuse and then wire a switch to the location of your choosing. Wire the switch to the ground leg of the circuit. The white wire with a red stripe is the voltage side. Don't wire it there.

[frydguy79]

thanks Van!!
i knew i had seen this somewhere before!

[Fordie]

DACTYL, whoever would read instructions...

Maybe there is a sticky somewhere we could add this to??

Cheers, Fordie

[Dactyl]

Originally Posted by Fordie

DACTYL, whoever would read instructions...

Maybe there is a sticky somewhere we could add this to??

Cheers, Fordie

I must give credit where credit is due. I explained this process to Fordie and then he sent me this wonderful little PDF with instructions and everything. All the credit to Fordie. He's the magician when it comes to instructions and PDF's.

Cheers to Fordie.

Dactyl

[Joe G]

Good instructions, thanks Fordie & Dactyl.


One question - this mod will turn on the water pump but NOT the fans, correct?


-

[BEEKAY GT500]

nice clean document.

[Birdman]

Originally Posted by Joe G

Good instructions, thanks Fordie & Dactyl.


One question - this mod will turn on the water pump but NOT the fans, correct?


-

Correct,this particular mod only pertains to the IC pump not the fans.

[Rags]

Good job guy's, those are nice simple instructions.

[Vette Killer]

Originally Posted by Dactyl

Water Pump is controlled by the ECU. In order to do this you would want to by-pass the relay for the water pump with a 20 AMP Mini Fuse and then wire a switch to the location of your choosing. Wire the switch to the ground leg of the circuit. The white wire with a red stripe is the voltage side. Don't wire it there.

Did anyone take this a step futher and look at the gauge of wire used on the circuits? I agree the circuit will function as explained with the fuse but the way it is wired you are using the low current control circuit to power the high current circuit.

I do not know the specifics of this harness but generally speaking manufactures build a harness as cheap as possible and will use much lighter gauge wiring on the control circuit as it only caries the current needed for the relay coil and carries no working circuit load (i.e. pump motor draw)...that is the whole point of using relays. I would be very concerned about pulling a 20 amp load through control circuit wiring without having someone validate that Ford uses the same guage wiring for both circuits on that relay.

The jumper idea is not going to cause any concern at all.

[Dactyl]

Originally Posted by Vette Killer

Did anyone take this a step futher and look at the gauge of wire used on the circuits? I agree the circuit will function as explained with the fuse but the way it is wired you are using the low current control circuit to power the high current circuit.

I do not know the specifics of this harness but generally speaking manufactures build a harness as cheap as possible and will use much lighter gauge wiring on the control circuit as it only caries the current needed for the relay coil and carries no working circuit load (i.e. pump motor draw)...that is the whole point of using relays. I would be very concerned about pulling a 20 amp load through control circuit wiring without having someone validate that Ford uses the same guage wiring for both circuits on that relay.

The jumper idea is not going to cause any concern at all.

Each Fan gets its own independent relay. The Fan gets power directly from the battery by attaching to the power side of the Fuse holder on the passenger side fuse box. The wire taps that attach to the water pump control wire (white with red stripe) merely receive a signal of voltage that triggers the relays to go closed loop and then allow the power from the battery to supply power to the fans.

I ran all of this by a "little birdie, former SVT Engineer" and we discussed in detail ampacity and draw. It's all good. We are drawing very little off of the water pump circuit to trigger the relays.

It's been reviewed and tested and causes no issues.

Thanks for the intuitive question.

[Birdman]

Originally Posted by Dactyl

Each Fan gets its own independent relay. The Fan gets power directly from the battery by attaching to the power side of the Fuse holder on the passenger side fuse box. The wire taps that attach to the water pump control wire (white with red stripe) merely receive a signal of voltage that triggers the relays to go closed loop and then allow the power from the battery to supply power to the fans.

I ran all of this by a "little birdie, former SVT Engineer" and we discussed in detail ampacity and draw. It's all good. We are drawing very little off of the water pump circuit to trigger the relays.

It's been reviewed and tested and causes no issues.

Thanks for the intuitive question.

Thanks for the intuitive answer Van....

[gr8snkbite]

just like him..pops in..answers...then leaves...him and i are gonna have a little chat...

[Dactyl]

Originally Posted by gr8snkbite

just like him..pops in..answers...then leaves...him and i are gonna have a little chat...

Bring it Capt. Nemo. Oh, I'm sorry, Master Chief Nemo, RET. Does the RET. stand for ................

Who's yo Daddy? LOL

Sorry, gotta go datalog another car. GT500 with a shot of Nitrous. Sit down, Shut Up and Hold on to the laptop!

[gr8snkbite]

Originally Posted by Dactyl

Bring it Capt. Nemo. Oh, I'm sorry, Master Chief Nemo, RET. Does the RET. stand for ................

Who's yo Daddy? LOL

Sorry, gotta go datalog another car. GT500 with a shot of Nitrous. Sit down, Shut Up and Hold on to the laptop!

u funny flyin prehistoric bird....