hapynzap,

Finally found the post which gave me the info to check in the wiring diagram.

Neal said that the gray w/ White stripe is the pos connection to the AC, not the neg.

Take the Gray w/ White stripe and connect it to pin #8.

Sorry but don't listen to FAL on this one, This is the way all of the E-Fan users have them installed around here ( be it the PPI or the FAL kit ) as far as for those who have posted.

Take a look, and move the connection from pin#7 to pin #8 and she won't kill off the engine any more, or at least if the VSC is not smoked, and if the gray w/ white stripe that you have is the same one as the one under the fuse box is. IF you need to check, find a member with a EVTM for yur year if you want to confirm, but I don't think they have changed them that much from yours to mine.

https://www.f150online.com/forums/sh...5&pagenumber=1

Good luck, give it a try and let us know.

Steve

 

Steve,
Thanks for the link. At this point of frustration my next try is to get an AC signal off of the pressure switch on the AC accumulator. It might be a day or two before I can get to look at it.

John

 

hapynzap,

Your truck doesn't have an A/C relay. The best place to get an A/C signal is from the Compressor Clutch solenoid. The black wire is neg and the other one is the + feed from either the PCM WOT relay or from the A/C switch (which passes through the pressure cut off switch and the Cycling pressure switch) depending on the year.

JMC

 

JMC,
That explains a few things then. Do you think I'm on the right track trying to get a signal off the pressure switch at the accumulator then?
John

 

I a word Yes. Early models did not have the A/C cut out at WOT. They were wired + from fuse to Heater control switch to the pressure cut off switch and the Cycling pressure switch in series and then to A/C Clutch solenoid and PCM in parallel. I suspect that is the way yours is configured. You would have to splice in after the Cycling pressure switch or at the A/C clutch Solenoid. If you cut in any where else you risk having the fans running all the time. I would not bother going near the Fuse box as there is no power to any A/C relay. I pulled my + signal foo the A/C clutch solenoid. The Cycling Pressure switch is near the firewall on the accumulator and would make for a clean installation as far as hiding wires. Wish I would have thought of that. Just make sure you splice on the correct side of the switch. With the A/C on and the compressor on pull the connector on the switch on the accumulator and probe for 12V. Only one wire should have it. Once you have found the 12V use the other wire. Tip; it should be the same colour as the wire from the A/C Clutch solenoid + lead.

JMC

 

JMC
I looked at it and the small wiring harness going into the plug on the pressure switch appears to have 2 wires in it. Of course it's wrapped so when I unwrap it. You are saying one wire will be hot at the plug and to tap into the other wire. Sounds good to me. Yes it will be a short run to my VCM for a cleaner application.

The accumulator is back by the firewall and will be somewhat of a hassle to get to but since I only have to do this once I can put up with that hassle. It's going to be a couple days till I can get to this project.

Everything else on the FAL 270 is working great as it's supposed to but with spring around the corner I want my AC fans to work right too.

I'll post an update later.

 

Ahh the beauty of an old thread.

I finally got around to hooking up my ac actuator wire on the controller today for connector #8. I tapped into the positive wire on the pressure switch of the AC accumulator. I also wrapped this connection with electric tape before plugging it back in. Everything is working OK. Fans come on in all interior fan controller positions except "floor" and "panel".



If anybody is interested. I pulled my ignition on wire to the contoller from the power line to the passenger side coil pack. Here again I wrapped it up with electrical tape when finished.

 

Great write up.
I didn't read all the reply's but I had a controller fail after 2 months. I did not want to use the controller in the first place, but did. Anyway, I got one fan wired to the A/C, and another wired to a manual switch. I am going to install a normally open temp switch in the LB drain hole, and run the fan that is currently wired to the A/C to that. While you are moving the fans are not needed. You all new that but........

MK

 

All,

The new issue of Off-Road magazine has an article on installing these electric fans on an f-150.

Pete

 

Not a bad guess.......I just put an e-fan setup on my buddies Chevy 1500 this weekend.......I am sure the fans weigh about the same.


--Joe

 

Well, I know it's been a while, but I finally finished my fan wiring.

hapynzap -

I tied into the Grey/White wire under the fuse block for the AC control as suggested by sscully. Thanks for the tip, Steve! Made it very easy to make a clean connection.

I pulled the Ignition-On power from inside the same underhood fusebox. While looking around inside, I noticed a relay socket that was empty. 1 of the legs is switched on and off via the key, so guess where I tied in at? I like it when it goes smooth. IMO, that doesn't happen often enough...

sscully -

Thanks again, and a question: Does your controller have the 60% and then 100% mode of operation? My paperwork says it does, but I have yet to hear them run at any speed other than the initial turn-on speed. Also, there is only 1 potentiometer on my controller. I have read where you adjust the 2 threshold turn-on points, but I can't seem to find any note of this with my controller.

Any thoughts?

Thanks so much for any info you can provide...

 

B-Man
The wiring on my 98 is differnet - that's why I had so much trouble figuring it out. It changed in 99+

The second fan turn on point of 10+ degrees it auto set by FAL. You have to be running it pretty hard to get it up that extra 10* to go 100%.

 

I love this good info! This is why I joined this board.

Question: How hard is it to remove the exhisting fan?

 

OK I have a 97 F150 4x4 and will be installing the FAL kit soon the question I would like answered is what does everyone who has hooked up the A/C on wire think the best location for this is? And can you post the details so I can refer back to them when i need to for my install. Most of the info that has been posted on this thread is great and will be very helpful However there seems to be a some confusion as to the whole A/C wire hook up.

Richard D.

 

deep6blue -

If you use a screwdriver to wedge 1 of the 4 pulley bolts against the fan, you can break 1 of them free. Once you remove it, drill a hole in a piece of 3/4" wide x however long aluminum or steel stock. Put the pulley bolt through this stock and tighten it snug.

Now you can use it as a lever to hold the pulley when you break the fan loose. Fan is threaded on right handed, so just take it off like the pulley bolt you just removed.

Crayon Drawing Of the Set-Up

I apologize for the crude pic, but you should be able to decipher my gibberish when you look at it...