C-3 Transistorized Ignition wire harness - NCRS Discussion Boards

C-3 Transistorized Ignition wire harness

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  • Michael Ketterer

    C-3 Transistorized Ignition wire harness

    Hello everyone, I really need some help with this. I am putting the TI system back in the car. 1968 after Jan. I have the 5343 pig tail apx 24" long plus the main wire harness original of apx 80" long total of apx 104"
    At the distributor side of the main harness I have the pink and gray wires into a two way connector (for distributor pink to white distributor lead and gray to green/white distributor lead) with a pink wire back out of pink ( to starter motor)
    I have a large white wire apx 12gauge with a splay end ( to posi side of coil)
    I have large pink (looks pink) wire apx 12gauge with single connector. Is this wire the one that connects to ignition switch???
    And I do not have a black 18gauge in the harness for the (neg side of coil back to amp box as ground. Is there suppost to be one in the harness.
    The main harness at the amp end pig tail plug looks to have the original paper electrical tape on it.
    Its at the distributor side of harness that has new plastic electrical tape over the original paper tape at that end.
    The pig tail is a new reproduction and is not like the Assembly Manual page H338 showing wire out of harness grounding the box to the radiator frame.
    Am I missing something here or correct in what I am thinking.......That the reproduction harness for the amp box is missing the black 18gauge wire out grounding the amp box to radiator frame. And then where is the wire for the neg. side of coil at the distributor side of harness??
    Thanks for any help in advance, I know its alot to digest
    Thanks Michael Ketterer
    Ps every thing in brackets is what I think is correct
  • Timothy B.
    Extremely Frequent Poster
    • April 30, 1983
    • 5186

    #2
    Re: C-3 Transistorized Ignition wire harness

    Michael,

    I think you are correct about the ignition switch connection wire in the harness. There should be a distributor plug, a starter solenoid pig tail from that plug, a coil + (white resistence) wire and Ignition switch (power feed resistence wire). On Corvette there should also be a black negitive coil wire that goes from the - side of the coil back to ground thru the TI harness and grounds with the amplifier as you describe.

    Check where you purchased this harness because I think metal body GM cars used a different harness where the - coil wire grounds on the engine and the amplifier box is mounted on metal core support so everything is grounded. You can also do the same if all your engine grounds are in place and mount the amp box on core support. I would get the correct harness for your car because there are two resistence wires in the correct harness, the power feed wire that plugs to ignition switch and the white coil + wire, both in the TI harness.

    If you go to the Transistor Ignition web site there is a description of the harness for Corvette and you can double check everything. Also, the owner Dave Feidler is a great person to talk with if you have any questions or need parts.




    Comment

    • Timothy B.
      Extremely Frequent Poster
      • April 30, 1983
      • 5186

      #3
      Re: C-3 Transistorized Ignition wire harness

      Michael,

      I think you are correct about the ignition switch connection wire in the harness. There should be a distributor plug, a starter solenoid pig tail from that plug, a coil + (white resistence) wire and Ignition switch (power feed resistence wire). On Corvette there should also be a black negitive coil wire that goes from the - side of the coil back to ground thru the TI harness and grounds with the amplifier as you describe.

      Check where you purchased this harness because I think metal body GM cars used a different harness where the - coil wire grounds on the engine and the amplifier box is mounted on metal core support so everything is grounded. You can also do the same if all your engine grounds are in place and mount the amp box on core support. I would get the correct harness for your car because there are two resistence wires in the correct harness, the power feed wire that plugs to ignition switch and the white coil + wire, both in the TI harness.

      If you go to the Transistor Ignition web site there is a description of the harness for Corvette and you can double check everything. Also, the owner Dave Feidler is a great person to talk with if you have any questions or need parts.




      Comment

      • Michael Ketterer

        #4
        Re: C-3 Transistorized Ignition wire harness

        Timothy
        Thanks for the help, Thats what I thought about the reproduction pig tail for late 68 and up. That it is missing the wire loop from the reproduction (apx 24") harness its self to ground the amp box back to the radiator core support!
        But this also indicates that the Original main harness (apx 80") is missing the black ground at the distributor end of harness.
        And thats what I guess that I am looking for confirmation on.
        And that would really _ _ _ (you get my drift).
        If anybody could elaborate on this part of the (post) subject,
        I would be most grateful.
        Thanks again
        This board is so great and just checking daily is a wealth of information!
        Thanks again
        Michael Ketterer
        ps Timothy I have been to Dave's sight. And Dave just called me the other day on the Distributor, that I had a question about. I hate to wear him out.

        Comment

        • Michael Ketterer

          #5
          Re: C-3 Transistorized Ignition wire harness

          Timothy
          Thanks for the help, Thats what I thought about the reproduction pig tail for late 68 and up. That it is missing the wire loop from the reproduction (apx 24") harness its self to ground the amp box back to the radiator core support!
          But this also indicates that the Original main harness (apx 80") is missing the black ground at the distributor end of harness.
          And thats what I guess that I am looking for confirmation on.
          And that would really _ _ _ (you get my drift).
          If anybody could elaborate on this part of the (post) subject,
          I would be most grateful.
          Thanks again
          This board is so great and just checking daily is a wealth of information!
          Thanks again
          Michael Ketterer
          ps Timothy I have been to Dave's sight. And Dave just called me the other day on the Distributor, that I had a question about. I hate to wear him out.

          Comment

          • Timothy B.
            Extremely Frequent Poster
            • April 30, 1983
            • 5186

            #6
            Re: C-3 Transistorized Ignition wire harness

            Michael,

            If you have the original 80" harness there should be a black groung wire that goes to the coil - and also on the other end goes to one of the mounting bolts on the amplifier then to the core support for ground. This grounds both the coil and the amp. You said it looks like the harness has been tampered with at the distributor end so check and see if the ground wire has been cut. It's possible that someone changed the ground because the core support ground became corroded.

            On the small amp harness there should only be three wires and none are grounds, look at the picture and follow the ground wire.

            Comment

            • Timothy B.
              Extremely Frequent Poster
              • April 30, 1983
              • 5186

              #7
              Re: C-3 Transistorized Ignition wire harness

              Michael,

              If you have the original 80" harness there should be a black groung wire that goes to the coil - and also on the other end goes to one of the mounting bolts on the amplifier then to the core support for ground. This grounds both the coil and the amp. You said it looks like the harness has been tampered with at the distributor end so check and see if the ground wire has been cut. It's possible that someone changed the ground because the core support ground became corroded.

              On the small amp harness there should only be three wires and none are grounds, look at the picture and follow the ground wire.

              Comment

              • Michael Ketterer

                #8
                Re: C-3 Transistorized Ignition wire harness

                Timothy
                WOW! Thank-you!!!
                Thats what I needed to know its not the amp pig tail (apx 24") that has the ground (( like the assembly manual shows )) It is the main (apx 80") harness
                that incorporates the grounds.
                And I am guessing that the pic your are talking about is at Dave's sight on the wiring diagram? If so I down loaded, and printed that.
                Anyone know were I may purchase some of the original looking tape to rewrap the main 80" harness?? I guess thats one more chore that I need to do.
                Cutting off the old wrap and probably running a new ground in the main harness!
                Oh you have to really love a Corvette to keep on going with the adventure!!
                Thanks again,
                This board and people are the BEST.
                Thanks
                Michael Ketterer

                Comment

                • Michael Ketterer

                  #9
                  Re: C-3 Transistorized Ignition wire harness

                  Timothy
                  WOW! Thank-you!!!
                  Thats what I needed to know its not the amp pig tail (apx 24") that has the ground (( like the assembly manual shows )) It is the main (apx 80") harness
                  that incorporates the grounds.
                  And I am guessing that the pic your are talking about is at Dave's sight on the wiring diagram? If so I down loaded, and printed that.
                  Anyone know were I may purchase some of the original looking tape to rewrap the main 80" harness?? I guess thats one more chore that I need to do.
                  Cutting off the old wrap and probably running a new ground in the main harness!
                  Oh you have to really love a Corvette to keep on going with the adventure!!
                  Thanks again,
                  This board and people are the BEST.
                  Thanks
                  Michael Ketterer

                  Comment

                  • Brad M.
                    Expired
                    • July 31, 2005
                    • 262

                    #10
                    Re: C-3 Transistorized Ignition wire harness

                    I got a roll of that cloth type tape from Tracy's, it took them a while to figure out which type i needed (I worked with Peter on it).

                    The most interesting thing to me in looking at my harness was that there is a resistor wire that is within the harness that does not go out to the amp. it just does a U-turn in the harness as it apparently needed to have extra length to give proper resistence. I think it may ultimately go between the distributor and the ignition switch (but can not remember for sure on that part).

                    Comment

                    • Brad M.
                      Expired
                      • July 31, 2005
                      • 262

                      #11
                      Re: C-3 Transistorized Ignition wire harness

                      I got a roll of that cloth type tape from Tracy's, it took them a while to figure out which type i needed (I worked with Peter on it).

                      The most interesting thing to me in looking at my harness was that there is a resistor wire that is within the harness that does not go out to the amp. it just does a U-turn in the harness as it apparently needed to have extra length to give proper resistence. I think it may ultimately go between the distributor and the ignition switch (but can not remember for sure on that part).

                      Comment

                      • Timothy B.
                        Extremely Frequent Poster
                        • April 30, 1983
                        • 5186

                        #12
                        Re: C-3 Transistorized Ignition wire harness

                        Michael,

                        In my first post there is a link to the wiring diagram picture. You can also purchase a new harness from M&H fabricators or from Dave Feidler. Keep in mind there are two resistence wires in that TI harness so it may be wise to get a new one. Make sure all your grounds are clean and I think you will be good.

                        Comment

                        • Timothy B.
                          Extremely Frequent Poster
                          • April 30, 1983
                          • 5186

                          #13
                          Re: C-3 Transistorized Ignition wire harness

                          Michael,

                          In my first post there is a link to the wiring diagram picture. You can also purchase a new harness from M&H fabricators or from Dave Feidler. Keep in mind there are two resistence wires in that TI harness so it may be wise to get a new one. Make sure all your grounds are clean and I think you will be good.

                          Comment

                          • Michael Ketterer

                            #14
                            Re: C-3 Transistorized Ignition wire harness

                            Brad
                            Thank you, do you have a web or physical address or phone number for Tracy's
                            And yea my main harness has a thick spot under the original tape and figured that it was something like that!
                            And do you remember the type of tape you bought from Peter?
                            I really appreciate all the input from you guy's makes life a lot better!
                            Thanks again to all, I hope everyone has a GREAT day!
                            Michael Ketterer

                            Comment

                            • Michael Ketterer

                              #15
                              Re: C-3 Transistorized Ignition wire harness

                              Brad
                              Thank you, do you have a web or physical address or phone number for Tracy's
                              And yea my main harness has a thick spot under the original tape and figured that it was something like that!
                              And do you remember the type of tape you bought from Peter?
                              I really appreciate all the input from you guy's makes life a lot better!
                              Thanks again to all, I hope everyone has a GREAT day!
                              Michael Ketterer

                              Comment

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