Battery relocated in trunk.

Electrical and Ignition

  1. Buford19

    Buford19 Well-Known Member

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    Was wondering what route people are running battery cables from the trunk location? Is it best to run them outside right away , or keep them in the car as long as possible?
     
  2. kybatman

    kybatman The Original Bruce Wayne!

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    mine is in the car all the way to trans hump and then exits..

    Comes down the passenger side wireway.

    Bruce
     
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    • kursplat

      kursplat FABO Gold Member FABO Gold Member

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      i've always run them inside, in the driver side wiring channel. the car i'm doing now will probably be in the passenger side channel as i'm planning to move a bunch of stuff around. i also use some sort of covering over the wire for protection. i have a coil of hydraulic hose cover i used on the last one
       
    • Buford19

      Buford19 Well-Known Member

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      Nice to see pictures if you guys have any. Like to see exist points inside to outside. Thanks for any input.
       
    • AJ/FormS

      AJ/FormS 68 B'cuda fb, Form S clone ... 367/A833/3.55s FABO Gold Member

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      I have a 68 Cuda so it was easy to run it inside like kybatman did, except I took it up the firewall and entered the engine compartment just above the frame-rail. I moved the starter relay down there, then ran a slanty cable up over the bellhouse to the starter. It's impossible to get booster cables in there. I bolted the negative to the rear frame-rail. I used an Optima drycell.
       
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      • 66jim

        66jim Well-Known Member

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        Inside passenger quarter panel over wheel well inside door sill then thru lower
        pass. firewall (use grommet) across firewall over engine/ trans then down to starter.
        Use a Ford type starter solinoid at the battery in trunk, this way the the cable is only
        "hot" when engine cranking.
         
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        • kybatman

          kybatman The Original Bruce Wayne!

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          I split a copper pipe insulator and put it over the wire at the single pinch point behind the rear seat just for peace of mind.

          I chose the passenger side so it would be the sole wire on that side.

          Bruce
           
        • dicksmidlac

          dicksmidlac FABO Gold Member FABO Gold Member

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          I went down pass side inside but relocated my wiring to inside firewall to keep the engine Bay clean of wires
           
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          • AJ/FormS

            AJ/FormS 68 B'cuda fb, Form S clone ... 367/A833/3.55s FABO Gold Member

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            If you do it this way, how does the alternator charge the battery?
            Ima guessing you run a separate full-time charge wire...
             
          • my68barracuda

            my68barracuda Well-Known Member

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            Photos of the rear mounted battery in the 68 Barracuda.
            I used 1 gauge welding cable, end to end over wrapped with Scotch electrical tape, then sheathed in flex conduit wrap.
            On the positive side I ringed the sheathed cable about every 12 inches with red electrical tape, on the ground did the same with black tape. I ran a complete cable ground from the battery to the engine block. I have a MS3 Pro for fuel and ignition I want a really clean electrical configuration. Photos show the rest, cable not laid in place but will go through the side channels then through holes cut into the fire wall, have grommets for those. Hot wire directly to starter post, from there will connect up to starter relay then to the alternator. Ground will go to one of the engine-starter mount bolts, will be sure there is no paint to interfere with the ground connection.

            26FF53A7-5C62-4B4D-9C9B-5E8D35FE8722.jpeg

            8FDCDEE5-E285-49CF-831C-68AFA6AA482E.jpeg

            98A5FE7C-A48A-4358-BC0E-1B1A7467B5C3.jpeg
             
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            • my68barracuda

              my68barracuda Well-Known Member

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              to attach the cable lugs, I have used solder pellets
              Solder Pellets, Slugs and Flux | Waytek Wire

              put the lug in a vise, drop the pellet in and heat the lug to the solder pellet melts, have the cable close by and ready, end stripped, fluxed,,,,
              plunge the stripped end of the cable into the molten solder in the lug.

              I have also crimped the lug in a vise using a crimping die, I flow solder into these after crimping.
               
            • Buford19

              Buford19 Well-Known Member

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              So I can’t run the positive cable directly to the starter. Was under the impression that the positive cable goes directly to the starter.
               
            • kursplat

              kursplat FABO Gold Member FABO Gold Member

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              that's what i do, battery cable right to the starter
               
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              • AJ/FormS

                AJ/FormS 68 B'cuda fb, Form S clone ... 367/A833/3.55s FABO Gold Member

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                The factory start relay has a binding post on it, that I used
                 
              • 66jim

                66jim Well-Known Member

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                Yes you run 3 wires from engine compartment
                One 2 gauge from solinoid output to starter
                One 6 gauge from alternator stud direct to battery positive or solinoid input
                One 12 gauge from starter relay to trigger of solinoid
                Battery positive 2 gauge to solinoid input
                Battery negative 2 gauge to chassis ( used pinch weld in trunk) only about 1 foot long.
                Go to a welding supply place and get the 2 gauge stuff its very flexible and has a tuff
                coating.
                Mounted Ford type solinoid to the plastic box that holds the battery.
                 
              • kursplat

                kursplat FABO Gold Member FABO Gold Member

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                i go straight to the starter because i'm going right past it anyway.
                 
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                • 66jim

                  66jim Well-Known Member

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                  Direct from battery to starter you will have maybe 10-15 feet of large gauge wire that is always hot. Works but can you imagine what would happen if it shorted to
                  chassis ....... meltdown no more mopar! Yes the factory did it under the hood but was much shorter
                  and its path less complex.
                   
                • AJ/FormS

                  AJ/FormS 68 B'cuda fb, Form S clone ... 367/A833/3.55s FABO Gold Member

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                  Well that makes a lotta sense.
                  But
                  I bought the Mopar kit in 1999, and going up the passenger side, the cable was too short to reach the starter. No big deal, I just moved the relay and jumpered over. Then I ran the field wire thru a relay that shuts off the alternator when the emergency shut-off gets tripped.
                   
                • kursplat

                  kursplat FABO Gold Member FABO Gold Member

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                  the one with the cloth cover? i thought that was awesome
                   
                • AJ/FormS

                  AJ/FormS 68 B'cuda fb, Form S clone ... 367/A833/3.55s FABO Gold Member

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                  I don't recall a cloth cover just a paper box with cables anchit P4349500
                   
                • kursplat

                  kursplat FABO Gold Member FABO Gold Member

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                  bought mine around 1980, 81'
                   
                • crackedback

                  crackedback FABO Gold Member FABO Gold Member

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                  For the Pos to starter, I run from the rear pass corner, across the top of shock crossmember area in trunk, then up the drivers side sill plate area. If it's an auto car, use the clutch grommet for a pass through point. Grommet is close to the starter and down low on firewall, yet high enough to keep your feet off it.

                  lEhqKWf.jpg

                  XBTU75J.jpg

                  I also run a Ford style relay in the trunk to keep that cable cold except when starting. The alternator wire is also on a Continuous Duty relay so when the kill switch is thrown, nothing outside about a 2" cube is hot in the car. It's a safety thing. Until you watch a 25K race car burn to the ground because of a constant hot alt wire, you may not understand. BTDT, put a CD relay in all the time now.

                  How my stuff is set up all the time now.
                  LGHIGbK.jpg
                   
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                  • Jimacuda

                    Jimacuda Well-Known Member

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                    About the same as Robs.:rolleyes:
                    OK, I stole his diagram and modified it...:lol:


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                    IMG_20180201_180402155.jpg IMG_20180212_183748635.jpg
                     
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