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Ford electric fan

Discussion in 'Early CJ5 and CJ6 Tech' started by alleycat3677, Oct 13, 2015.

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  1. Oct 13, 2015
    alleycat3677

    alleycat3677 Member

    Upstate NY
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    So PO installed an electric fan from a Taurus. Problem is the headlights and front blinkers are wired in the same circuit. No thermo switch either. Fan runs constantly. First-how do I isolate the lights?
    Second-where do I get a switch so the fan goes on and off? I already had to get a solenoid for a golf cart that can handle the constant draw from the fan. Sometimes I can tell when the battery is low from on/off cycles due to distributer issues I had because the fan shuts off and the blinkers come on dim. I'm assuming it's due to not enough juice to switch the relay? Maybe. Thanks
     
    alleycat3677, Oct 13, 2015
    #1
  2. Oct 13, 2015
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
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    I think you can pick up a coolent switch that will come on and off at set temps. Probably easiest way.

    What engine do you have?

    I think the switch should provide a ground when "on". Wire in a relay using the switch as the low current ground
     
    Last edited: Oct 13, 2015
    termin8ed, Oct 13, 2015
    #2
  3. Oct 13, 2015
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    I am at a loss to try and understand how the fan could be wired to the headlight circuit unless you mean it gets it's power from the hot wire to the light switch. Does it have a separate switch to turn it on? It should be fed from a circuit from the ignition switch to turn it on when the engine is running. It running would be controlled by a thermo switch as you mention. If your battery gets low then you have charging issues also.

    I had a Taurus and if I remember right there was a resistor for the fan which I believe draws too much current without the resistor. And why does the fan wiring go through a solenoid?
     
    Glenn, Oct 13, 2015
    #3
  4. Oct 14, 2015
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    To straighten out the wiring, I would suggest you use paper and pens and draw out the circuit. If you can't figure it out from that, post the drawing and maybe we can help.
     
    timgr, Oct 14, 2015
    #4
  5. Oct 14, 2015
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    cordele, Ga.
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    From this statement you would have to have your headlights ON before the fan would work. Are you sure you are looking at the correct power source?
     
    Walt Couch, Oct 14, 2015
    #5
  6. Oct 14, 2015
    alleycat3677

    alleycat3677 Member

    Upstate NY
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    Okay. I'll explain what I can considering I know nothing about this. The fan dose come on with the ignition. If I've been starting and stopping the engine a lot (which I have to fix my timing issue) there doesn't seem to be enough juice to trigger the relay. Then my blinkers come on dim,my headlights won't work,and all the lights inside (blinker,high beam etc) come on and stay on till I drive it and get some juice flowing from the alternator. There is no thermo switch to the fan. It runs at high speed constantly. This is very confusing to me. Everything else electric works fine. And NO there is no thermo switch to the fan! I'm just worried about overheating. It's a 225 Dauntless
     
    Last edited: Oct 14, 2015
    alleycat3677, Oct 14, 2015
    #6
  7. Oct 14, 2015
    alleycat3677

    alleycat3677 Member

    Upstate NY
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    And my engine is the 225 Dauntless!
     
    alleycat3677, Oct 14, 2015
    #7
  8. Oct 14, 2015
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    You apparently have some charging issues. The alternator should charge as long as the engine is running, sometimes not as much at idle. When the engine is cold or cool you can run it for a few minutes without the fan on. I say that in case it will help with troubleshooting issues. Your description about the interior lights sounds like there are other issues too. Other guys on here will be able to better help with the electrical issues, i.e. relays and such. Posting a picture or 2 of the alternator, fan and wiring will probably be a big help too.
     
    Glenn, Oct 14, 2015
    #8
  9. Oct 14, 2015
    alleycat3677

    alleycat3677 Member

    Upstate NY
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    Don't know how to post pics. Don't have a PC. Just my phone.
     
    alleycat3677, Oct 14, 2015
    #9
  10. Oct 14, 2015
    alleycat3677

    alleycat3677 Member

    Upstate NY
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    The alternator charges fine. Used a meter to check! I would just go back to a regular fan because this isn't a trail jeep or crawler but the jeep has a body lift and I think it would be too low. Only about half would be pulling air through the radiator!!!
     
    alleycat3677, Oct 14, 2015
    #10
  11. Oct 14, 2015
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Weak battery then? You mentioned low on juice as if not charging....remember it should charge even at idle. :) I agree with going back to a regular fan, that will eliminate an electrical issue.
     
    Glenn, Oct 14, 2015
    #11
  12. Oct 14, 2015
    alleycat3677

    alleycat3677 Member

    Upstate NY
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    Funny you say that! Bought a new battery today and replaced the terminal clamps. Same deal!!! Although the old battery was almost shot!
     
    alleycat3677, Oct 14, 2015
    #12
  13. Oct 14, 2015
    alleycat3677

    alleycat3677 Member

    Upstate NY
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    What about the body lift and the motor being lower? Won't that make the normal fan not work as it should?
     
    alleycat3677, Oct 14, 2015
    #13
  14. Oct 14, 2015
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    How much lift is there? Do you have a shroud?
     
    Glenn, Oct 14, 2015
    #14
  15. Oct 14, 2015
    alleycat3677

    alleycat3677 Member

    Upstate NY
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    IDK. Probably half the fan would be at the radiator. No. I don't have a shroud. The Taurus fan is in its own shroud.
     
    alleycat3677, Oct 14, 2015
    #15
  16. Oct 14, 2015
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Other guys on here have experienced this predicament, which is most likely why the Taurus fan was installed. It sounds like the regular fan wouldn't be sufficient based on your description. Do you need the body lift? If not take it off is my suggestion.
     
    Glenn, Oct 14, 2015
    #16
  17. Oct 14, 2015
    alleycat3677

    alleycat3677 Member

    Upstate NY
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    It has welded on nerf bars that will not allow me to take the body lift out. Plus the PO has put all kinds of new lines (brake,fuel etc) that would all need replacing. The jeep looks,sounds,and rides awesome. I can go 55 and let go of the week for as long as I want. I want to get a aftermarket temp gauge but the factory fitting looks huge. And mine doesn't work so I have no clue how hot she's actually running.
     
    alleycat3677, Oct 14, 2015
    #17
  18. Oct 14, 2015
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    I believe you are stuck with using an electric fan then because as you know you need to pull air across the whole radiator. Do a search on here for electric fans, plus I'm sure others will chime in with suggestions on solving this issue.
     
    Glenn, Oct 14, 2015
    #18
  19. Oct 14, 2015
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    These jeeps are famous for aftermarket add-on's so I have no idea what you have. The 225 v6 usually has an electric temp gauge that uses a pretty small sender. Is your temp gauge in your speedo housing or somewhere else?
     
    Walt Couch, Oct 14, 2015
    #19
  20. Oct 14, 2015
    alleycat3677

    alleycat3677 Member

    Upstate NY
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    It's in the speedo. Neither it nor fuel gauge works. I just found a mechanical gauge that has the right fitting. No worries. And I will just carry a couple of gallons of extra gas in case she runs out.
     
    alleycat3677, Oct 14, 2015
    #20
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