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Turn Signal Gremlin

Discussion in 'Intermediate CJ-5/6/7/8' started by NC73CJ5, Jan 18, 2022.

  1. Jan 18, 2022
    NC73CJ5

    NC73CJ5 New Member

    North Carolina
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    Dec 18, 2020
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    I took apart the dash on my ‘73 to rebuild the heat / defroster, which seems to have been a success. I thought I carefully labeled each wire connection and put all back as it was. Everything seems to work, except now when I turn on my turn signals, both sides flash. Left or right, same thing. Any thoughts on where I should start to figure this out?
     
  2. Jan 19, 2022
    sterlclan

    sterlclan Member 2021 Sponsor

    exploring the...
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    Check the grounds
     
    heavychevy and Lockman like this.
  3. Jan 19, 2022
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Medford Mass USA
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    With a single filament for both, all the action for brakes and indicators happens in the turn signal switch. If it were mine, I would sit down with the schematic and draw it out, then measure at each point I could get to.

    Good idea to check the grounds. They always seem to be a source of trouble.

    It's very hard to diagnose such problems without the Jeep in front of you. Suggest you trace it out and measure.
     
  4. Jan 19, 2022
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member

    Tantallon, Nova...
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    Four way flasher switch?
     
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  5. Jan 19, 2022
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    I think the flasher goes out separately from the brakes and indicators. Expect it has to if it's going to flash at all four corners. I would expect if either of the indicators are shorted to the brakes, then both sides would flash instead of the one side.

    I don't have the time to trace this out for the OP today; I would encourage him to take the initiative and write out the schematic for the flashers and indicators on a sheet of paper. Or if he can read the schematic and follow each circuit, that will be enough to understand where to test and what to do. Possibly photocopy the schematic and trace each wire with colored pencil; whatever works for you.
     
  6. Jan 19, 2022
    NC73CJ5

    NC73CJ5 New Member

    North Carolina
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    It may very well be the hookup to the hazard flasher switch. When I first connected the battery, the front yellow lights came on. I switched some wires on the hazard switch and that seemed to fix it. There is an incredible amount of wiring passing through that switch, lots of room for a mix up. I’ll try that.
     
  7. Jan 27, 2022
    NC73CJ5

    NC73CJ5 New Member

    North Carolina
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    Update: it was the wiring connections to the hazard flasher switch. I moved them around to different terminals, and that fixed it.
     
    Walt Couch likes this.
  8. Jan 27, 2022
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2022 Sponsor 2021 Sponsor 2020 Sponsor

    cordele, Ga.
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    Glad to hear it. Good show. :beer:
     
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