Yes - red with some color of stripe on it.

 

HI!... When I used to have A/C on my truck I tapped into the wire harness for the A/C compressor right next to the passenger's side valve cover. The wire I tapped into was grey with a white tracer. The best way to figure out the proper wire to tap into is to use a 12v test light. Simple ground it and probe the wire. Then have someone turn on the a/c. If it lights up then that is the correct wire. If it doesn't then move on to the next wire and so on, and so on until you find the one the lights up the test light. It's VERY simple to do.

 

How interesting Neal the three wires I checked that are on my cam covers are black one big black one a small black one and a small black with green stripe. I think i am going to tap into the one like hapynzap did seems to be the easiest and possibley best place up high on the firewall and I can just run the wires back behind the battery and Washer fluuid resevior since I think I will be putting the control panel on the metal just behind the passenger headlight.

Richard D.

 

I followed Neal's lead on this when I installed mine on a 01.

I got it under the fuse box as Zyg did, using the color code the Neal provided in a post.

I could have gotten it closer to the VSC on the Pass side, but running the wire was that bad.

You can kind of see it in this picture, it is a blue T tap that I used, text describes the termination to the VSC.

The best place to mount the VSC is behind the pass side headlight on the sheet metal. I got this from Easterisland, when he smoked a VSC at the track FAL suggested mounting here when he got the replacement. Don't bother mounting it to the fan mounting kit.

https://www.f150online.com/galleries...9915&anum=2028

Steve

 

Hey Steve,
That worked for you but remember us guys with 97-98 have different wiring.

I'm gonna be helping a local guy next week put his FAL 270 on his 2002 screw and I'm going to recommend he tap in at the AC pressure switch too. We'll see.
John

 

SSCULLY do you have a switch installed for when you are on the highway or do you let run all the time when the A/C is on?

John

 

If you didn't want the fans to run in the winter when the AC compressor comes on or on a long trip you could also just pull the wire off the #8 terminal on the FAL controller. Running an off switch into the cab shuts the fans off under ALL conditions. Forget one time they are off and you could have problems.

Our truck normally doesn't get out of the city and only has short freeway trips so the fans running all the time with the AC on are not an issue with us. My wife drives our truck too and I don't know If I want to trust her with a fan cut-off switch. Know what I mean? heh

 

That is what i was wondering i saw in this post not sure who did it but they ran a switch would it hurt not to run a switch and just let it run all the time when the A/C is on and if i read this right this is just one fan right.

John

 

Nope, it's both fans if you are talking about the FAL 270 kit.

If you want to wire so that it won't run the fans on the Interstate but WILL run the fans if the engine is too warm (just like it is designed), set it up as follows:

Put the Normally Open side of a switch in series with the lead coming from the AC compresssor. When the air is on, the switch is open so the fans won't run.

However, when the thermostat reaches the turn-on temp, the fans will operate normally. (The wifey doesn't have to remember anything here, hapynzap !!)

Now, if you are idling or sitting still BEFORE the truck has warmed up, the fans will not run. This can cause the AC to not cool properly, as witnessed by Francis (posted earlier in this thread). If this is the situation, simply flip the switch, the fans come on and all is well.

I personally think this is the cleanest way of setting up the override for highway use, because you don't have to worry about forgetting the switch when you come off the highway. Worst case, if your truck isn't warmed up, you'll get some warm air in your face until you activate the fans...

Just my $.02 worth...

 

B-Man
I was thinking the same thing this morning. Put your switch on the AC signal wire rather than having a total cut off switch like JMC for water crossings, heh.

I dont think I'll be doing this though because we need all the AC we can get here in Arizona for 6 months out of the year. I will say now that the few times I have run the AC it is really cold now and that is on regular AC, NOT Max AC!

 

FYI,

When you wire in accessories like e-fans you should make a note of which wire went where, what colour it was and what colour wire you spliced into. You should also note what circuit it was spliced into. This will prove invaluable when something goes wrong and you or your mechanic tried to troubleshoot the problem. E-fans are simple because the instructions tell you where to wire things. Putting notes in your instructions as to where and colour wire you spliced is easy. Keep the notes in the glove box and that is where they will be when you need them.

Regards

Jean Marc Chartier

 

thanks for the info guy's

John

 

je3169,

I just let mine come on with the AC as normal.

Don't see a huge need to shut off the AC cycle of the fans, and it onle runs with the compressor, not always with the selector switch.

It is not that big of a deal just to let them run, it is not taking any HP to run them ( less you call parasyditic loss of the alternator needed to run them a big loss ).

The switch in line with the AC signal wire is the bet way to turn them off so you don't forget them and leave them off.

Steve

 

Steve thanks for info so when you turn your A/C on both your fans turn on i think that is what i am reading and i am going to get the fan kit from Mike T will these work the same way?

John

 

John,

The fan kit from PPI uses the Derale controllers. You can get a wiring instruction sheet from Derale's web site.
http://www.derale.com/instructions/16759.html
The instructions from PPI has information on how to install their kit.

JMC