I'll get some pics in the morning when it's daylight. Jim, you're right it is a resistor for the low speed circuit. I just went outside and turned on the high speed side and it worked as usual, but the low speed didn't come on because I have the resistor unplugged laying right here. I'll also test the voltage draw as suggested.

This is a really stupid question, but what is the purpose of a relay? Do you use this in addition to a fuse? Once again, I really appreciate the help. This is how I teach myself about mechanics by trial and error, and the good people at f150online Thanks guys.

-Spencer

 

In this case a relay is used to switch the high amp power.. You use a small switch to turn on the relay which turns on the high amp power

Doug

 

Hope this helps explain relays for you: Relay Basics

In this Wiring Accessories with a Relay link, substitute your fan for the horn:

Basically, you want to use your switch to control the relay, and the relay then carries the high current – not your switch.

Good Luck!

 

I used the same fan on my L. It is a 2001 Cobra fan. I cut out a place on my L shroud and mounted it with the fan. The 2000 Cobra fan is cheaper and comes without the resistor.

I can't help much with the wiring. Ask CornerCarver, he wired mine up for me and did an excellent job.

Also, I used a painless sensor for thermostat control. Time I got done, I had close to $250.00 to $300.00 with all the parts.

I tried to save a buck. Sometimes it's better to just buy a kit already assembled to install. I wish I would have just bought a JDM or JL kit and saved myself a lot of my time fabricating stuff.

 

Don't use a 40 amp fuse with the #10 wire. This is beyond the current rating for that size of wire. Trust me on this, I'm an electrician i know what i'm taking about. Refer to my previous post. You really need to find out the current rating on the motor to wire it correctly. What everyone else is saying about the relay is correct. It's basically an electric switch. You use a signal device (temp sender, toggle switch, etc..,) to send power to the relays coil which in turn closes a set of contacts to drive whatever load is connected to it.

 

Thanks guys. I'll stick with the 30 amp fuse and wire in a relay today. I'm thinking of just leaving out the resistor and using the high speed circuit all of the time, except on the highway when I can safely run without a fan.

For all those thinking about this for a mod, just buy a kit from a tuner. I'm getting pretty close to that price now with all of my screw ups, and I don't even have a Cobra R pump like they include

 

You definitely have a resistor(the lower numerals followed by K indicate this). It sounds like you have lowered your load resistance the fan is seeing by putting/wiring the hot lead in either parallel/series circuit. This causes resistance to drop, which causes current(amps) to draw even higher than your wire or fuse ratings. Make sure you have a "clean" or single path to power if you are not sure how to wire. I would recommend a heavier gauge for power(4-8awg) with as short a lead as you can. All of this will help not to decrease load resistance. 30 amp is fine. I have my own e.fan & wired myself w/ NO problems. I have helped many others,also. Don't get discouraged,you are close to solving this problem. Let me know if you want personal email.

 

Here's the switch:

The red wire comes directly from the battery. It starts to get hot as it comes into the fuse, and is even hotter from the fuse to the switch. The fuse body itself gets hot also. The blue wire go's to to the high speed, black is low speed. I'll try installing 8 gauge power wire tonight, along with a 30 amp relay I got from Radio Shack.

This is the connector for the resistor:

Like I said, I'll probably leave that unplugged and remove the low speed circuit. Thanks guys, I feel like I'm making progress now.

 

Well guys, it looks like I'm taking a step backwards. I'll count this as a $200 learning experience and count my losses. This d@mn thing just won't work right. I'm putting the stock fan back on. If anyone wants to give me a few bucks for a new e-fan from a GT just e mail me, it only has ~100 miles on it. Thanks for the help.

-Spencer
rscoleman@hotmail.com