Help with Install
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Senior Member
Joined: Aug 2003
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From: Frederick, MD
Help with Install
Hello folks 
I am installing an active (fan attached) transmission cooler and need some wiring help. I need to find a switched ignition source capable of running the fan. Where is a good switched 12v source? All help is appreciated - thanks.
Jeff
I am installing an active (fan attached) transmission cooler and need some wiring help. I need to find a switched ignition source capable of running the fan. Where is a good switched 12v source? All help is appreciated - thanks.
Jeff
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Joined: Jun 2002
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From: Under the flightpath of old ORD 22R
1. You are only going to find a hot in run postion circuit for activating a relay, to run the trans cooler, not for running the fan itself.
2. There are a few ways around this, but the easiest I found was the Black with a red strip in the steering column. It is a 12 AWG wire, that is hot in the run postion. This is what I used as the trigger for my FAL fan controller on my '10 SCrew.
2. There are a few ways around this, but the easiest I found was the Black with a red strip in the steering column. It is a 12 AWG wire, that is hot in the run postion. This is what I used as the trigger for my FAL fan controller on my '10 SCrew.
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From: Under the flightpath of old ORD 22R
Originally Posted by jjszabo
..<snip>...I can power the fan from that wire - is this correct? ..<snip>...
You can power a relay that is powered from the battery through the relay, to the fan.
I just don't want any confusion in this, if you hook the fan directly to that, you will blow a fuse, and your truck will not run. Worse case, you might cause damage to the factory harness, and not be able to start / run your truck.
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Joined: Aug 2003
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From: Frederick, MD
Thanks again SSCULLY. I am currently looking for a 12v relay to power the fan. I am hooking the fan to the battery through the relay. I am going to use the switched signal wire going to my radiator electrical fans to "trigger" the relay to close.
Can you just buy a 12v power relay?
Thanks again.
Jeff
Can you just buy a 12v power relay?
Thanks again.
Jeff
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Joined: Jun 2002
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From: Under the flightpath of old ORD 22R
Originally Posted by jjszabo
..<snip>...Can you just buy a 12v power relay?
You can find them at any Napa, AutoZone, part plus, etc.
Just check what the draw is on the fan unit, to buy the correct size ( 20, 30 or 40 AMPs ).
Good luck.
steve
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Joined: Feb 2006
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From: MN
Jeff,
What cooler/fan are you using? Had you considered just adding a fan to the existing factory tranny cooler?
I am considering adding a fan to the factory tranny cooler in my 05 F150. I am trying to bring down the tranny oil temp when towing up long grades. It has risen to 215 F on a hot day going up a long hill.
Dan
What cooler/fan are you using? Had you considered just adding a fan to the existing factory tranny cooler?
I am considering adding a fan to the factory tranny cooler in my 05 F150. I am trying to bring down the tranny oil temp when towing up long grades. It has risen to 215 F on a hot day going up a long hill.
Dan
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From: Under the flightpath of old ORD 22R
Originally Posted by dmac5356
Jeff,
What cooler/fan are you using? Had you considered just adding a fan to the existing factory tranny cooler?
I am considering adding a fan to the factory tranny cooler in my 05 F150. I am trying to bring down the tranny oil temp when towing up long grades. It has risen to 215 F on a hot day going up a long hill.
Dan
What cooler/fan are you using? Had you considered just adding a fan to the existing factory tranny cooler?
I am considering adding a fan to the factory tranny cooler in my 05 F150. I am trying to bring down the tranny oil temp when towing up long grades. It has risen to 215 F on a hot day going up a long hill.
Dan
For ~ $240.00, it is best to get a stacked plate remote cooler, and an electric fan, with the temp probe and controller for it.
Placing a fan on the so-so efficent factory trans cooler, is just a bandaid on the problem, not a cure for it.
Something like this is best :
