electrical gremlins

Discussion in 'Electrical and Ignition' started by UDUST81, May 11, 2018.

  1. UDUST81

    UDUST81 Well-Known Member

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    hey just want to say thanks in advance to everyone, im experiencing some electrical problems, car is a 72 duster, with a big block and chrysler electronic ignition, i pulled the motor this spring to deal with some pesky leaks but no electrical problems before and just recently reinstalled it in the car, problem is i have no power, zip nada nothing, i have over 12 volts at the battery, and i have power to my starter relay and starter, so if i jump the terminals on the relay with a screwdriver the motor turns over but will not start as i have no spark, even my headlights will not turn on with the key on or off, i changed the starter relay thinking maybe that could be the issue and to no avail, as well as pulling the starter to make sure terminals were loose and still no power, also made sure block was still grounded to chassis and no problem there, im kinda lost now as i didnt alter anything while pulling or reinstalling the motor, any help would be appreciated as i dont know where to look now thanks FABO!
     
  2. Treblig

    Treblig FABO Gold Member FABO Gold Member

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    You could have shorted out a power wire or blew a fuse during installation??

    treblig
     
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    • 67Dart273

      67Dart273 Well-Known Member

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      This sounds like the fuse link/ bulkhead connector/ ammeter wiring

      This article is about these problems, but we really just want the diagram for now

      Catalog

      Simplified diagram of your main primary power

      amp-ga18.jpg

      From the starter relay, goes through the fuseable link, through the bulkhead connector, through the ammeter, and to the BLACK ammeter wire. At some point under the dash harness, the black has a WELDED SPLICE which distributes power as shown to headlights, ignition switch, etc

      I would start right there at the fuseable link and bulkhead connector and go next to the ammeter
       
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      • UDUST81

        UDUST81 Well-Known Member

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        first off i shouldve said when i pulled the starter i noticed one of the terminals had turned and ground out on the block, ive fixed that and now im trying to go through your list, quick question, with my multimeter i stabbed the wire on both ends of the fuseable link as it is wired up in the car and i am getting conductivity, so i wanted to confirm it is good, or is there a chance im getting backfeed through the system fooling me into thinking the fuseable link is good? or can i move on down the list assuming it is okay? i just dont want to move on if it could be the problem...
         
      • 67Dart273

        67Dart273 Well-Known Member

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        I would check the fuse link "under load" because if everything is shut off it can conduct "just enough" (if bad) to send you on the wrong track. So turn on the ignition, and headlights, and hook your meter to ground. You should have 12V on both ends of the fuse link. Then probe "right into where the fuse link enters the bulkhead connector. You should have battery power there. If you nothing at all, no dome, no headlamps, no ignition, I'd first suspect "right in" the bulkhead terminals. Dissassemble the bulkhead connector and clean and inspect. They are a HUGE problem

        If you don't have a service manual, go to MyMopar and download one, free
         
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        • 67Dart273

          67Dart273 Well-Known Member

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          Have you had any arcs and sparks or smoke or smell lately?
           
        • UDUST81

          UDUST81 Well-Known Member

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          no arcs or smells that ive noticed at all no
           
        • UDUST81

          UDUST81 Well-Known Member

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          first off thank you so much for your help its really been a lifesaver as electrical is the one thing i truely struggle with, and i really appreciate the help, anyways, fuseable link is still good when i went to plug my meter into the bulkhead connector i noticed my headlights flicker so i just kinda pushed it in tighter and turned the key and bam! i have power! so glad to have found the problem so now i can deal with it! so what can i do to prevent this from happening again?
           
        • 67Dart273

          67Dart273 Well-Known Member

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          Start by reading that article in the link in post 3. At the least you need to clean/ rebuild your bulkhead connector. You can buy those terminals, they are called "packard 56". There are different types, and you must find the kind where the edges are curled around like this below

          2465x1__47238.1272727870.380.500.jpg


          These kind below---with the tab folded over the top will NOT fit many Mopar connectors. They will fit some of the later cars "some" connectors

          159912x5__31969.1360444193.380.500.jpg
           
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          • Pawned

            Pawned N.R.A. Lifetime Member - And damn proud of it FABO Gold Member

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            sounds like the fusible link, if you still have one. Do you have schematics of the car?
            also the best first step to find an electrical problem is to smell for odors.
            They may be subtle and had to find but they are probably still there.
            did you try hot wiring it?