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Right turn signal not working

Discussion in 'Early CJ5 and CJ6 Tech' started by pgte3, Oct 10, 2011.

  1. Oct 22, 2011
    Walt Couch

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

    cordele, Ga.
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    Connect your volt meter and your test light at the same time to the same place. The circuit under test may be able to pass voltage but not enough current to light the test light. Be sure the test light and volt meter are using the same ground point.
     
  2. Oct 22, 2011
    pgte3

    pgte3 Member

    Guilderland, NY
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    Connected both the test light and multimeter to the negitive terminal on battery, then using the other probe of the meter and light, touched the pin in the light socket. Meter reads 11.8V, light not on. Moved test light to positive terminal, light on.
     
  3. Oct 22, 2011
    chuck123wapati

    chuck123wapati Member

    wyoming
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    hook your test light to the positive of the battery and check first your fenders/chassis then grill, then finally the socket. that should tell you if you have a well grounded chassis,then grill then socket. rust and corrosion will kill you. i've seen alot of light sockets that just needed regrounded, taken off and the attaching srews and surfaces cleaned. Once you know you you have good electrical connections then look at the hardware.
     
  4. Oct 22, 2011
    Walt Couch

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

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    When you were reading the 11.8V and also had the test light touching the hot pin with no light "ON" at the test light, did your volt meter still show 11.8V?
     
  5. Oct 22, 2011
    pgte3

    pgte3 Member

    Guilderland, NY
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    No, the voltage drop to almost 0, repeated a few times to verify. Not enough voltage to light the bulb?

    Also, clipped the test light to the positive terminal, probed frame (light on), probed fender and grille (light on), probed brass base of inserted 1157 buld (light on).
     
    Last edited: Oct 22, 2011
  6. Oct 22, 2011
    chuck123wapati

    chuck123wapati Member

    wyoming
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    now you know you have good ground your problem lies with the power side of the signal. turn on right blinker and check for power from the socket pin then backwards through the circuit to see where you'r losing the power.
     
  7. Oct 22, 2011
    Walt Couch

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

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    This is a perfect example of residual voltage. A very good lesson here for all to remember when fixing an electrical problem. Make sure you have a very good source of power going into the turn signal wire to the front light. have your 1157 bulb installed. Use your test light to make sure you have power at the start of your turn-signal wire under the dash. You may have a plug-in connector under the dash that connects the turn signal harness into the main wiring harness. If so then use the test probe to check the outgoing side of plug-in for power and if so then keep on going down the line until you loose power. You will likely find a taped over splice where the wire had been cut and twisted back together by fingers.
     
  8. Oct 22, 2011
    chuck123wapati

    chuck123wapati Member

    wyoming
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    yup exactly! I've been taught by my dad to check for a good ground first then work back but its the same principle indeed! As an MGB owner I've done alot of this type of troubleshooting and I hate it.
     
  9. Oct 22, 2011
    pgte3

    pgte3 Member

    Guilderland, NY
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    Found it. Read the same lowish (11.8V) voltage that I read at the turn signal light ,back at the turn signal switch. Voltage at the turn signal switch would not light test light. Followed wires back through the flasher. Followed the power wire from the flasher back to the ignition. Discover a in-line fuse that was blown, but also had some other type of circuit inside. Even though the fuse was blown, voltage was able to pass through, but not enough to light the test light. I used a jumper wire to bypass the fuse, all turn signals flash. Will get new fuse tomorrow.

    Thanks to all that helped, especially CW. Newbie learned some stuff, thanks.
     
  10. Oct 22, 2011
    Walt Couch

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

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    Glad it finally worked out for you.
     
  11. Oct 22, 2011
    pgte3

    pgte3 Member

    Guilderland, NY
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    my bad, thats thanks to WC not CW
     
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