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  #31  
Old March 24th, 2010, 12:26
muddeprived muddeprived is offline
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Re: How can I hook up an efan timer on a 2001?

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Originally Posted by fyrfytr1717 View Post
Yeah, 30A stuff seems to be the norm. Even my Blue Sea Systems fuse box (Rated for 120A total) is only rated at 30A per circuit. Could you use 30A? Honestly, I don't know. I don't know what the power draw is when the fan starts up. I do know the factory protects it with a 40A and seeing as the factory undersizes things whenever possible, I imagine 40A is the proper fuse to use. I'm sure there are folks out there that have used a 30A fuse in this application. Maybe they could provide some insight?

You can still wire a majority of this up today. The fuse should be located as close to the battery as possible. Wire everything else up and run your power wire just short of the battery. When the fuse holder shows up, put it in place and you're good to go. Might as well take advantage of the good weather...
yeah I'm gonna.

i got a 40 amp circuit breaker from advance and I ordered that 40 amp 8g maxi fuse holder on amazon. So whenever the fuse holder gets here, I'll swap it in place of the circuit breaker. Sound good?
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  #32  
Old March 24th, 2010, 22:51
fyrfytr1717 fyrfytr1717 is offline
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Re: How can I hook up an efan timer on a 2001?

An automotive or marine style circuit breaker should be just fine. You could probably even use it instead of the fuse if you wanted... I went with a circuit breaker to protect my aftermarket fuse box.
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  #33  
Old March 25th, 2010, 09:00
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lazyxj lazyxj is offline
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Re: How can I hook up an efan timer on a 2001?

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Originally Posted by fyrfytr1717 View Post
Should be as easy as changing Trigger Mode (Jumper 4) from "B" to "A" so the relay is triggered when power is removed from the trigger terminal. I'm assuming when you say yours is triggered with a 12V "pulse" that you are using a momentary switch to trigger it? If so, the timer should function just the same for you even after switching the jumper. The only difference will be that instead of the delay starting when you push your switch, it will start when you release your switch.

Additionally, if you're already wired up this way, you are set up to answer my other question about whether the trigger controls both the relay and the timer, or just the timer. When you get a chance, switch your Jumper over to "A". Then try holding down your momentary switch and check to see whether or not this immediately starts the fan. Doing this would simulate turning on your ignition using my wiring diagram.

If the fan doesn't come on until you release the momentary switch, my wiring diagram should work as intended. If the fan comes on while you're still holding it down, my diagram needs the trigger reworked to keep the fan from running continuously while the ignition is on.
Mine is wired, as you guessed, with a momentary push-button provide a ‘pulse’ of 12-volt + power.
I tried your suggestion last night to switch the jumper JP4 from 'B' to 'A'.
Unexpectedly, it changed nothing; the fan still starts as soon as the button is pushed. I was surprised, so I tried exchanging jumpers, thinking the JP4 jumper was defective. Also tried switching the Relay Begin and End jumper with no luck.
Maybe my timer if defective, I hope yours works the way you think it should. Time will tell.

The fan relay is wired with 10-gauge wire with an in-line fuse holding a 30-amp ATC/ATO fuse. It has never blown the 30-amp fuse.
BTW, 10-gauge is supposed to be rated for a maximum of 30-amp without significant voltage drop.

Let us know if you figure out how to make the timer turn on when the ignition is turned off. I would still prefer it was wired that way. I would install a three-position toggle switch with the following features

1. Allow the use of the timer,
2. Manually over-ride the timer and run the fan constantly and
3. An 'off' position to limit the electric fan operation to its normal, ECM computer control.
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  #34  
Old March 25th, 2010, 11:23
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kastein kastein is offline
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Re: How can I hook up an efan timer on a 2001?

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Originally Posted by lazyxj View Post
Let us know if you figure out how to make the timer turn on when the ignition is turned off. I would still prefer it was wired that way. I would install a three-position toggle switch with the following features
1. Allow the use of the timer,
2. Manually over-ride the timer and run the fan constantly and
3. An 'off' position to limit the electric fan operation to its normal, ECM computer control.
Ask and ye shall receive:

Use an on-off-on type SPDT switch.
Switch in the up position (toggle pointing down) = continuous fan operation
Switch in the center position = OEM operation
Switch in the down position (toggle pointing up) = timer operation

I'm not sure if the diagram has been updated/changed since fyrfytr posted it on page 1, but if it has, I did not add those updates and they still need to be added.
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  #35  
Old March 26th, 2010, 19:28
muddeprived muddeprived is offline
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Re: How can I hook up an efan timer on a 2001?

Hey guys. I was thinking of adding a fan light on the dash so I know when the fan is running. Is wiring it up as simple as wiring one end of the light to the fan power wire and the other to a ground?
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  #36  
Old March 26th, 2010, 20:08
fyrfytr1717 fyrfytr1717 is offline
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Re: How can I hook up an efan timer on a 2001?

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Originally Posted by lazyxj View Post
Mine is wired, as you guessed, with a momentary push-button provide a ‘pulse’ of 12-volt + power.
I tried your suggestion last night to switch the jumper JP4 from 'B' to 'A'.
Unexpectedly, it changed nothing; the fan still starts as soon as the button is pushed. I was surprised, so I tried exchanging jumpers, thinking the JP4 jumper was defective. Also tried switching the Relay Begin and End jumper with no luck.
Maybe my timer if defective, I hope yours works the way you think it should. Time will tell.
Well, if you're wired up the way I think you are, this is bad news for using the removal of ignition power as the timer starter without having the fan run continuously. If the fan starts running immediately upon pushing and holding the button, this means the trigger kicks the relay on.

Given the above information, switching JP4 from B to A would only have been noticeable if you had your stopwatch out. On B, the timer should have started as soon as you pushed your momentary switch. On A, the timer should have started as soon as you released the switch. Probably only a few seconds difference unless you were holding that switch down for a long time.

Switching BEGIN and END on the other hand should have been noticeable. According the ELK's info, BEGIN turns the relay on when triggered and off when the timer expires. END turns the relay off when triggered and back on when the timer expires. I'm not sure what to tell you if that jumper didn't change anything.

Now just to clarify since I don't know exactly how your push-button switch works, does it remain closed as long as you hold it in the down position (like honking your horn), or does it momentarily close on the way down and then automatically open itself (like a BBQ igniter)? If it's BBQ igniter style, what I wrote above is incorrect and there is still hope of this working as is...

Oh, and if not, I think there may be a Plan C for ignition operation. I think it involves using the ignition to activate a N/C relay which in turn provides the trigger to the timer. I'm going to have to think about it for a bit...
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  #37  
Old March 26th, 2010, 20:20
fyrfytr1717 fyrfytr1717 is offline
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Re: How can I hook up an efan timer on a 2001?

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Originally Posted by muddeprived View Post
Hey guys. I was thinking of adding a fan light on the dash so I know when the fan is running. Is wiring it up as simple as wiring one end of the light to the fan power wire and the other to a ground?
Getting a little ahead of ourselves, aren't we? Or is your timer working now?

I believe you are on the right track. You could even attach the 12V+ side to pin 87 on the new relay if that is more convenient. Attatching it to the N/O ouput on the timer would let you know only when the timer was activating the fan. Before you jump on the dash light idea however, let me remind you of one thing... Your radiator fan continuously cycles on and off whenever you are running the A/C or defroster. Not bad during the day, but annoying at night if it is in your line of sight.
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  #38  
Old March 26th, 2010, 20:50
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kastein kastein is offline
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Re: How can I hook up an efan timer on a 2001?

X2 on that. If you want to make it dim along with the rest of the dash lights, I believe you could wire the bulb from the fan power line to the dimmer line that feeds all the other dash lights - you'll want to place a diode in line with it, with the cathode (striped end) toward the dimmer line, to keep the dimmer line from backfeeding the e-fan and probably blowing the fuse. I'll see if I can find a color code for the dimmer wire on 97+, I want to say it's red with a black stripe but I'm not sure.
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My yard looks like Sanford & Sons.
Please do not PM me about the AW4 info thread unless you have a truly unique question that is not covered by it or info to add. I do not respond to questions answered by the thread.
Definitely do not hunt down my phone number at 3AM, text me about it, and then threaten violence when I am not helpful. It will not get you what you want.
CTeunuch: Sometimes I really wonder if this sport makes you insane, or it just attracts the mentally unstable.
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  #39  
Old March 26th, 2010, 21:32
fyrfytr1717 fyrfytr1717 is offline
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Re: How can I hook up an efan timer on a 2001?

Quote:
Originally Posted by kastein View Post
X2 on that. If you want to make it dim along with the rest of the dash lights, I believe you could wire the bulb from the fan power line to the dimmer line that feeds all the other dash lights - you'll want to place a diode in line with it, with the cathode (striped end) toward the dimmer line, to keep the dimmer line from backfeeding the e-fan and probably blowing the fuse. I'll see if I can find a color code for the dimmer wire on 97+, I want to say it's red with a black stripe but I'm not sure.
Dimmer on a 97+ is solid orange. I know you're the electrical guru here, but would hooking the light up between the fan's 12V+ power line and the dimmer's variable + power line really work? Don't you need a ground? Do you hook it up to the fan's - wire? Or would the difference in voltage between the two power wires cause the light to illuminate? I have so much to learn about electricity....
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  #40  
Old March 26th, 2010, 21:56
muddeprived muddeprived is offline
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Re: How can I hook up an efan timer on a 2001?

Quote:
Originally Posted by fyrfytr1717 View Post
Getting a little ahead of ourselves, aren't we? Or is your timer working now?

I believe you are on the right track. You could even attach the 12V+ side to pin 87 on the new relay if that is more convenient. Attatching it to the N/O ouput on the timer would let you know only when the timer was activating the fan. Before you jump on the dash light idea however, let me remind you of one thing... Your radiator fan continuously cycles on and off whenever you are running the A/C or defroster. Not bad during the day, but annoying at night if it is in your line of sight.
Well if I'm gonna wire this up I might as well get it all done at once so I'll add a light to it.

i don't use my AC or heat/defrost so the fan usually has a layer of dust on it lol. Light won't be on much really. I just want to make sure it's not on all the time, like a malfunction with the timer or something.
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  #41  
Old March 27th, 2010, 07:15
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kastein kastein is offline
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Re: How can I hook up an efan timer on a 2001?

Quote:
Originally Posted by fyrfytr1717 View Post
Dimmer on a 97+ is solid orange. I know you're the electrical guru here, but would hooking the light up between the fan's 12V+ power line and the dimmer's variable + power line really work? Don't you need a ground? Do you hook it up to the fan's - wire? Or would the difference in voltage between the two power wires cause the light to illuminate? I have so much to learn about electricity....
The dimmer circuit is a wacky one... it ranges from 12 to 0 volts. The higher the voltage gets, the lower the lights are supposed to go (at least on a 96-, I'm almost certain it's the same 97+ but I left my 97 FSM at work.) So connecting the bulb from the +12 on the fan to the dimmer circuit results in it grounding through the dimmer circuit. You can view the dimmer circuit as a ground that just happens to get lousier and lousier the dimmer the lights are supposed to be.

The only bad thing that could happen is if the fan is off and the lights are fully dimmed, which would put 12 volts on the dimmer line and backfeed through the bulb to the fan if you don't put in a diode between the "fan on" indicator and the dimmer line, with the cathode connected to the dimmer line.
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My yard looks like Sanford & Sons.
Please do not PM me about the AW4 info thread unless you have a truly unique question that is not covered by it or info to add. I do not respond to questions answered by the thread.
Definitely do not hunt down my phone number at 3AM, text me about it, and then threaten violence when I am not helpful. It will not get you what you want.
CTeunuch: Sometimes I really wonder if this sport makes you insane, or it just attracts the mentally unstable.
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  #42  
Old March 27th, 2010, 08:19
fyrfytr1717 fyrfytr1717 is offline
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Re: How can I hook up an efan timer on a 2001?

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Originally Posted by kastein View Post
The dimmer circuit is a wacky one... it ranges from 12 to 0 volts. The higher the voltage gets, the lower the lights are supposed to go (at least on a 96-, I'm almost certain it's the same 97+ but I left my 97 FSM at work.) So connecting the bulb from the +12 on the fan to the dimmer circuit results in it grounding through the dimmer circuit. You can view the dimmer circuit as a ground that just happens to get lousier and lousier the dimmer the lights are supposed to be.
Interesting, learned something new here. I'm going to have to experiment and see if I can get my winch power indicator light to work like this. It's pretty darn bright at night.
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  #43  
Old March 27th, 2010, 08:31
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Re: How can I hook up an efan timer on a 2001?

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Originally Posted by muddeprived View Post
Well if I'm gonna wire this up I might as well get it all done at once so I'll add a light to it.

i don't use my AC or heat/defrost so the fan usually has a layer of dust on it lol. Light won't be on much really. I just want to make sure it's not on all the time, like a malfunction with the timer or something.
You're going the opposite way that I would. I'd be hooking up the relay first and make it works when the trigger is activated. Then I would add the timer in. Then I would add the light.

If you get this whole thing in and it doesn't work the first time (estimate 60% likelihood) due to a bad connections, mis-chosen wire, whatever, then you have to start from the beginning troubleshooting.

Go step by step and make sure that each stage works. Plus, you get a little thrill when each step actually works.
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  #44  
Old March 27th, 2010, 09:35
muddeprived muddeprived is offline
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Re: How can I hook up an efan timer on a 2001?

Alright I hooked it all up and tested it. When I first connected the battery the fan turned on.......for 30 seconds. That got me excited cuz it's actually working LOL. i started it and shut it down....and it stayed on for another 30 seconds again. Sweet!

But the fan runs continuously when the motor is running so what do I gotta do to keep the fan from running while the jeep is running?
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  #45  
Old March 27th, 2010, 10:01
muddeprived muddeprived is offline
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Re: How can I hook up an efan timer on a 2001?

I changed JP4 to "B" and tried it. When I initially hooked up the battery, the fan ran for 30 seconds and shut off. When I started the jeep, the fan ran for 30 seconds and shut off. When I shut down the jeep, the fan doesn't run. Weird.
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