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How To Wire Sparton SCS-3R7 Turn Signal Switch On A V6 Cj5

Discussion in 'Early CJ5 and CJ6 Tech' started by maurywhurt, Dec 30, 2016.

  1. Dec 30, 2016
    maurywhurt

    maurywhurt Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    After a good deal of trial and error experimentation with my brother-in-law on his 1967 V6 CJ5 earlier this week, we were finally able to successfully connect the NOS Sparton SCS-3R7 (7-wire) turn signal switch he just bought from DeBella Jeep Parts. The jeep recently had a new wiring harness from Walck's installed (which by the way is excellent!), but I believe the wire colors on the new harness match those of the original Kaiser Jeep wiring harness.

    We put male bullet connectors on each of the Sparton switch wires, along with female bullet connectors on the two existing flasher output wires, which made the under-dash connections easier to deal with. We ran a separate dedicated ground wire connected with a spade terminal to one of the screws on the back of the turn signal switch housing (I'm not certain this was necessary, but we just wanted to make sure it wasn't an issue). Though it was optional since the old flasher was still working, we also installed a new Novita EL13 electronic flasher to replace the existing unit.

    The turn signal unit works properly now, including the small flashing indicator light on the switch housing. Just thought I would share this info in case it might save others some time, as the correct connections are different than they are for the earlier SCS-3R unit.

    The turn signal switch wires connected to the CJ5 V6 wiring harness as follows (the wire colors on the 4 cyl. or other Jeep vehicles' harnesses may or may not be the same):

    Sparton SCS-3R7 Wire Color --- Jeep Wiring Harness Wire (and Color)

    White --- Left Rear Turn Signal / Brake (Blue)

    Red --- Left Front Turn Signal (Yellow)

    Orange --- Right Rear Turn Signal / Brake (Orange)

    Green --- Right Front Turn Signal (Black)

    Blue --- Brake Light Switch (Brown)

    Black --- Flasher Terminal marked "L"

    Yellow --- Flasher Terminal marked "P"

    (Note: Third flasher terminal marked "X" is for fused 12v input from ACC terminal on ignition switch)
     
    Last edited: Dec 30, 2016
  2. Dec 30, 2016
    rejeep

    rejeep Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    Great post..
    (y)
     
  3. Dec 30, 2016
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    Don't think I've ever seen one where everything was working. (y)
     
    Hellion likes this.
  4. Dec 30, 2016
    maurywhurt

    maurywhurt Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    I suspect that the new Walck wiring harness has a whole lot to do with the fact that everything electrical is working on my brother in law's jeep (including the turn signals). I have the same wiring harness on my V6 CJ5, and it is absolutely top-drawer quality. Carl Walck builds them himself, and does a fantastic job of it.
     
    Last edited: Dec 30, 2016
  5. Dec 30, 2016
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

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    X2! I have one of Carl's harnesses on Tonk, worth every penny & more. :) It's not just that it fits, it's all the other stuff that it comes with like the connectors & bulb sockets.

    H.
     
  6. Dec 30, 2016
    wheelie

    wheelie beeg dummy 2024 Sponsor 2023 Sponsor

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    This may be a good thread for the technical index. Thanks for posting this.
     
  7. Dec 30, 2016
    Focker

    Focker That's a terrible idea...What time? Staff Member

    WA
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    You read my mind...Added as you were typing. (y)
     
  8. Dec 30, 2016
    maurywhurt

    maurywhurt Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    Glad you guys think it was worthwhile to post this.

    I only wish we'd had the information above in hand when we started trying to install the Sparton switch. It would have saved a lot of time and frustration!
     
  9. Jan 2, 2017
    Walt Couch

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

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    This info has been posted many times in the past but may have gotten lost in the change-over. Doesn't hurt to have it again.

    About your ground wire. It is highly recommended to do this as you have done. This gives a secure ground for the indicator light in the sparton housing. I usually run a black 18 or 20 gauge wire in the main harness up to the indicator bulb mounting screw.
     
  10. Jan 13, 2017
    maurywhurt

    maurywhurt Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    Just found these Sparton switch installation instructions online, which agree with the above:

    [​IMG]
     
    Last edited: Sep 12, 2017
  11. Jul 12, 2017
    r_unda

    r_unda Member

    Corpus Christi,...
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    Does the 7 wire Sparton cancels the stop light when you flip the turn signal switch? I just rewired my CJ and the brake light overrides the flasher, not sure if my switch is malfunctioning.

    Thanks
     
  12. Jul 12, 2017
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

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    Here's a really good explanation of how they work, or at least how they're supposed to work.

    7-Wire

    H.
     
  13. Jul 13, 2017
    Beach66Bum

    Beach66Bum 1966 Tuxedo Park Mark IV 2024 Sponsor

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    Yes it does. When you turn the indicator on for either a left or right turn, the rear tailight will blink accordandly. When you turn off the indicator, the taillight will go back to solid.
     
  14. Jul 13, 2017
    r_unda

    r_unda Member

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    Thanks for the info. Time to check my switch.
     
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  15. Aug 16, 2019
    Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

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    Didn't someone have a complete restoration thread on the Sparton ? I just received one and want it to have years of service before I have to remove it again.
     
  16. Aug 16, 2019
    Beach66Bum

    Beach66Bum 1966 Tuxedo Park Mark IV 2024 Sponsor

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    Yes, with full pictures. Search Sparton turn signal in search window
     
  17. Aug 16, 2019
    maurywhurt

    maurywhurt Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    Last edited: Aug 16, 2019
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  18. Aug 16, 2019
    Lee Bennett

    Lee Bennett Banned

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    I restored mine and have lots of detailed pics, but I don't have any verbiage written to do a thread. Probably too many pics to upload directly (not thru a third party site)
     
  19. Aug 17, 2019
    Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

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    A detailed tutorial type thread would be great.
     
  20. Aug 17, 2019
    Lee Bennett

    Lee Bennett Banned

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    Now that I think of it, I did post a thread on my restore. Should have been early this year.
     
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