Headlight Switch Cranks Engine??

Discussion in 'Electrical and Ignition' started by Manny Valencia, Jan 12, 2019.

  1. Manny Valencia

    Manny Valencia Well-Known Member

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    Hello

    This is one of many sudden crazy electrical issues im having..

    Has anyone ever experienced their head light switch cranking the car?

    Only connection the headlight switch has to the ignition system is the factory splice with the black alternator, black ammeter, and red ignition switch wire.

    This just started happening recently.

    Video
     
    Last edited: Jan 12, 2019
  2. krazykuda

    krazykuda FABO Gold Member FABO Gold Member

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    Nope...
     
  3. jimjimjimmy

    jimjimjimmy lobsterman FABO Gold Member

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    :popcorn::popcorn:
     
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    • Steven190

      Steven190 FABO Gold Member FABO Gold Member

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      Sounds like one of the black wires has a back feed, somewhere going back to the ignition switch.
       
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      • Treblig

        Treblig FABO Gold Member FABO Gold Member

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        I'm with the Popcorn Guy!! This should be interesting.....
         
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        • PcWilliams

          PcWilliams Member

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          Wow. Never heard of this. I'd be interested in the solution when you find it.

           
        • jos51700

          jos51700 Well-Known Member

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          My Dakota tries to engage the starter when you shift it from park. I've had the NSS disconnected and been using the pushbutton starter method for now. I'm going to say it's backfeeding through the reverse light circuit, but I don't know.

          Pull all the lighting fuses, and see if it still does it. Add them in, one at a time (while pulling the one you just tested) to see if you can narrow it down to a taillight, brake light, etc. circuit.
           
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          • TrailBeast

            TrailBeast Slightly Twisted Member

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            Sounds like a short between wires in the harness to me.
            (like a hot headlight wire melting into the starter solenoid wiring)
             
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            • Treblig

              Treblig FABO Gold Member FABO Gold Member

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              Maybe it's nothing more than an anti-theft device!!! I mean what car thief in their right mind would pull the light switch to start the car??/:rofl:
               
              Last edited: Jan 12, 2019
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              • 67Dart273

                67Dart273 Well-Known Member

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                Just like any other time on here, WHAT IN THE HELL ARE WE WORKING ON?

                Thank you. Thank you very much

                I vote for short inside the harness. Often when you have "some problem" and heat up some wires, the insulation melts, which can cause cross connections in the harness. The original problem may or may not be related with the CURRENT one.

                If you are working on a hemi Farmall I'm not familiar with those

                02.gif

                Neither am I familiar with the remote gunsights on a WWII B-29

                gallery-1448888814-b29-turret-fig1.png
                 
                Last edited: Jan 12, 2019
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                • 67Dart273

                  67Dart273 Well-Known Member

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                  WHY IS THIS IMPORTANT?

                  Well if you just want a bullshit answer, "it's not."

                  If you actually want help with some direction, then it might be

                  Carry on
                   
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                  • 67Dart273

                    67Dart273 Well-Known Member

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                    By the way, using PhacePhlant to host videos is a complete non-starter. I can't open your video without a "login" whatever that is.
                     
                  • Murray

                    Murray FABO Gold Member FABO Gold Member

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                    This wiring is really screwed up- I will be watching.
                     
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                    • 4spdragtop

                      4spdragtop FABO Gold Member FABO Gold Member

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                      I've shit my pants when someone hits the horn button??
                       
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                      • Manny Valencia

                        Manny Valencia Well-Known Member

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                        Coincidentally my rear lights stopped working and some of my turn signal lights have constant power when they shouldn't correct?

                        Let bulbs have real real low dim. I feel like this issue and the headlight issue are connected.

                        I took apart the under dash wiring undid everything and found no faults there.

                        Issue has to be wiring in engine compartment? Or faulty headlight switch?

                        I will replace my turn signal switch and my ignition switch was new when installed.

                        Will try testing as suggested by you guys! Thank you!!


                        20190111_162440.jpg

                        20190111_173813.jpg
                         
                        Last edited: Jan 12, 2019
                      • Manny Valencia

                        Manny Valencia Well-Known Member

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                        Update here is the headlight switch cranking engine when pulled

                        Also when I pull the key back it sends a quick shot of voltage and cranks engine

                         
                      • Cuda416

                        Cuda416 Well-Known Member

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                        Be careful you don't cross it with the ejection seat control....
                         
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                        • PcWilliams

                          PcWilliams Member

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                          You know, that's not a bad idea. :)
                           
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                          • 67Dart273

                            67Dart273 Well-Known Member

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                            Did you have the bulkhead connector apart? Maybe you simply "repinned" it wrongly? What happens if you twist the key to start. I see "round about" you did post that it's a 72 Dart

                            THIS IS IMPORTANT!!!

                            I would not start wildly replacing parts. I see no need at this point to say, replace the ignition switch. It is much more likely to be something wrong in the harness


                            Try operating the dimmer switch and see if the problem changes or goes away. Do any of the lights work properly?
                             
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                            • Manny Valencia

                              Manny Valencia Well-Known Member

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                              Only headlights work properly.

                              Dimmier switch I don't think ever worked
                               
                            • 67Dart273

                              67Dart273 Well-Known Member

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                              Unless mis-wired the headlights go through the dimmer switch. The dimmer switch is a 3 terminal switch that selects either high or low beam and routes that power out through the bulkhead connector to the lamps on the low or high beam wire

                              Sounds to me like you have more than one wiring problem
                               
                            • krazykuda

                              krazykuda FABO Gold Member FABO Gold Member

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                              How bad was your skid mark???

                              Skid Marks.jpg
                               
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                              • dirty white boy

                                dirty white boy 47 yr old Juvenal delinquent

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                                i wouldnt leave battery hooked up less your fire insurance is real good!!
                                 
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                                • Mattax

                                  Mattax Just the facts, ma'am FABO Gold Member

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                                  Honestly thought you were pulling everyone's leg.
                                  Anyway.
                                  1) if that's the only connections at the main splice, it's missing one. Should be also be a hot to the fusebox. That's the way most are but check the factory service manual..
                                  2) none of that is related to the ignition or the starter relay. That's the main junction. It's always hot. Power goes there onto whatever is calling for it.

                                  As others have said, there's a short between the headlight or marker lights or instrument lights wire and the start wires, usually lablled S in the factory diagrams.
                                  shown schematically here
                                   
                                  Last edited: Jan 13, 2019
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                                  • Manny Valencia

                                    Manny Valencia Well-Known Member

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                                    Thank you

                                    It does have the splice to the fuse box.

                                    I will investigate headlight power wires and search for a short