Headlight relay system and Convertible top relay system recommendation

Discussion in 'Electrical and Ignition' started by 67CudaBob, May 7, 2018.

  1. 67CudaBob

    67CudaBob FABO Gold Member FABO Gold Member

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    If anyone would like to take a load off their tired electrical system, I would highly recommend getting in touch with member crackedback (Rob) as he puts together relay systems with high quality components and great service (good instructions, and easy to reach with questions) to help install for those not that confident in their electrical skills.

    I completed both the headlight relay system and just this weekend the convertible top relay system, and there is a noticeable difference in performance. Great guy to deal with!
     
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    • Mopar Tim

      Mopar Tim FABO Gold Member FABO Gold Member

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      I use both and whole heartily agree! @crackedback is the man!
       
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      • RustyRatRod

        RustyRatRod Just another dumbass. FABO Gold Member Technical Editor

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        Yup Rob's a class act for sure.
         
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        • Dusterdenovo

          Dusterdenovo Contentedly Old School FABO Gold Member

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          I agree. As it turns out, last night was the first time I've had the Duster out after dark since installing Crackedback's headlight relays. After properly aiming the headlights they totally light up the road now. HUGE improvement. And the quality of the kit is about as good as it gets.
           
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          • 67Dart273

            67Dart273 Well-Known Member

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            Yup. Yup. Yup. LOL
             
          • matthon

            matthon Well-Known Member

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            On his headlight kit, does anyone know if there is a specific reason power is taken from the alternator, as opposed to the starter relay or battery?
             
          • mopowers

            mopowers Well-Known Member

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            Another shameless plug for Rob's relay kits. One of the best 5 upgrades I've done to my car. The quality is second to none. For what he sends, I can't imagine how he even makes any profit on these kits.
             
          • crackedback

            crackedback FABO Gold Member FABO Gold Member

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            Which item powers the car with the engine running? Also, the charging system issues if you don't have other components to address the mopar inadequacies.

            Thanks for the comments, I try my best to provide great products at a fair price.
             
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            • Mattax

              Mattax Just the facts, ma'am FABO Gold Member

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              This -
              To answer this, you need to know the following:
              Electricity flows from the highest voltage source.
              The Alternator should supply power at 14.5 Volts, although it may drop closer to 13.5 Volts at idle.
              The Battery will be around 12.5 Volts, although it may briefly float around 13 Volts when fully charged.

              Power flow when the alternator is working and the battery is fully charged will look something like this:
              Power_flow_when_charged.jpg

              more here: Understanding Charging Systems with Ammeter
               
              Last edited: May 8, 2018
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              • matthon

                matthon Well-Known Member

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                Thank you, great information. I have eliminated the ammeter and bulkhead connections, and installed a new fuse box with a circuit breaker as well as a new charge wire directly from the alternator to the starter relay.
                It appears, in my case, I can now run the headlight relays off the starter relay.
                Just trying to clean up the wiring and simplify.
                 
              • crackedback

                crackedback FABO Gold Member FABO Gold Member

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                Sound like you have a good handle on fixing the charging system.
                 
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                • matthon

                  matthon Well-Known Member

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                  Thanks to FABO.
                  The only missing piece is how to determine the length of the fusible link on the alternator charge wire?
                  60 amp alternator, 8 ga wire, not sure exactly how long if a run it is.

                  I have a 50 amp maxi fuse with an 8 ga, 60 amp holder I was going to use but I don't think it is the correct size. There are hundreds of opinions on maxi fuse/wire gauge size, and 1 confusing article on fusible link length I was able to find.
                   
                • Mattax

                  Mattax Just the facts, ma'am FABO Gold Member

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                  Sizes all fuses, breakers, etc. based on the weakest wire in the circuit. You seem to have a handle on how to wire distribution, so size each fuse or breaker for the circuits downstream. If you want to see what AMC did when they changed wiring strategies to something more like yours, I have a simplified version posted here: 1986 AMC Jeep SJ Charging and Ignition Wiring Diagram
                  The green ones are all 18 ga, and the yellow one 14 ga.
                  Links are 2 wire sizes smaller than the smallest wires in the circuit. Or at least smallest unfused wires in the circuit. You can see in the factory diagram the 14 ga fusible link connects to the 10 ga wire to the alternator. http://oljeep.com/gw/elec/86/86_FSJ_WiringDiagramPage2-1.gif

                  I can't tell you what the lengths ought to be, but if I remember where I saw it, I'll post up if no one else has. I want to say it was in a factory service manual, but even so, I don't know which one. Maybe the Chrysler Master Tech Bulletin on Wiring diagrams.
                   
                  Last edited: May 10, 2018
                • crackedback

                  crackedback FABO Gold Member FABO Gold Member

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                  I'd use a 12ga fusible link that is ~6" long.
                   
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                  • 69_340_GTS

                    69_340_GTS Well-Known Member

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                    I just rec'd my kit for my '69 Dart GTS from crackedback (Rob) and it is very nicely made, out of quality materials. I also cannot believe how fast it got here. Top notch! Thanks Rob.