Headlight relays on a car with concealed headlights

Electrical & Ignition

  1. Kern Dog

    Kern Dog FBBO Gold Member FBBO Gold Member

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    I am going to keep it wired as shown in the diagram and keep a paper copy in the car, in my FSM and in my car journal.
     
  2. Kern Dog

    Kern Dog FBBO Gold Member FBBO Gold Member

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    THANKS to Randy, Mark and Rob...The Pep Boys of electrical repair.
    This was a situation that defied logic to me. Given my limited knowledge of electrical stuff, it seemed logical to think that since the lights and doors worked fine before, that the relay kit was to blame. Crackedback has a great reputation so I hesitated to blame his product. His emails helped steer me away from his harness and to a problem within the car. 1WildR/T-Randy always jumps in on my topics and provides helpful advice. 1972GY8SE Mark stepped up nicely as well.
    In a couple more hours, I'll know just how much brighter the lights are.
     
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    • MoparGuy68

      MoparGuy68 Well-Known Member

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      Nice to see you fixed your problem, even though I don’t fully understand what the problem was. Stock relays didn’t work with Crackedback’s kit, is what I got out of it..
       
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      • 1 Wild R/T

        1 Wild R/T FBBO Gold Member FBBO Gold Member

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        But they have on other 70 Chargers which is kinda strange.... Especially since Greg tried swapping relays from his other 70 Charger which should logically show it's not a problem with the relay...
         
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        • blue69runner

          blue69runner Well-Known Member

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          So glad you found the problem. Electrical wiring can be testy for sure. Some times you just have to step back and take a deep breath and then go at it again. One question I have did you do this to take stress off the wiring or to buy pass the old system.
           
        • 1 Wild R/T

          1 Wild R/T FBBO Gold Member FBBO Gold Member

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          Guys do it because vintage Mopars are known for dim flickering headlights and burned up electrical connections... Adding relays takes the load off the switches, the bulkhead connector & the ammeter... Plus suddenly the headlights are much brighter & don't flicker... IMO it should be done to every vintage Mopar...
           
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          • 1 Wild R/T

            1 Wild R/T FBBO Gold Member FBBO Gold Member

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            Waiting for Greg's report on how much of an improvement the relays made...
             
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            • blue69runner

              blue69runner Well-Known Member

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              Yes have run into the same problem with older cars that the wiring and all is old. I agree to take the load off the wiring harness and other part's. If you have all new wiring then it should work fine. But would do this any ways after a while to keep from this problem happening. Thanks for the answer.
               
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              • Kern Dog

                Kern Dog FBBO Gold Member FBBO Gold Member

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                I did it because I wanted to also upgrade to more powerful headlights that would draw more power than these sealed beams. The wire harness on the engine side was new in 2013. The dash side is mostly original and in really nice shape.
                Years back, I had a 76 Camaro with 100% stock wiring. I put in Hella H4 headlights and was amazed at how much better the lighting was compared to stock sealed beams. I made no changes to the wiring on that car and it never proved to be a problem. I don't know whether the Chevrolets used a simpler wiring path or bigger gauge wiring but I never had flickering lights or charging issues. The lights have not flickered in this car either, at least not since I replaced the engine side light harness in 2013.
                One thing that I like about newer car headlights is that their light pattern seems more even. The light seems about the same across the main pattern then the edges just fade out. The Wife's '15 Challenger R/T has HID lights that are amazing. My 2007 Ram 1500 has stock lights that are pretty good too.
                Test drive tonight....The lights are brighter but the pattern sucks for low beams. It is like 2 balls of light that fade quickly from the center out. I like the brightness but not the pattern. Daniel Stern over at FABO (SlantsixDan) sells all sorts of lighting products including some interesting headlights. I may check back with him.
                 
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                • Crackedback

                  Crackedback Well-Known Member

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                  Even new wiring has significant voltage drop and poor output compared to a relay kit. The issue with bulbs is that output degrades exponentially with corresponding reduction in voltage inputs.
                   
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                  • Kern Dog

                    Kern Dog FBBO Gold Member FBBO Gold Member

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                    Those are big words, Rob. This isn't a Prius forum.

                    (Ha ha)
                     
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                    • Nacho-RT74

                      Nacho-RT74 FBBO Gold Member FBBO Gold Member

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                      So it was definitelly green and blue wires shorted out internally into the relay! Great it was a fairly easy fix with available replacement parts.

                      As mentioned, I would keep the breaker into the 30 line ( blue wire )
                       
                    • Kern Dog

                      Kern Dog FBBO Gold Member FBBO Gold Member

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                      I'm not experienced enough to know the exact problem but when I pulled the two green wires off of the H/L door relay, the headlights THEN only came on with the switch. I can only guess that something inside that switch was messed up. I used the same circuit breaker when I changed to the Bosch relay and the setup works with no defects now.
                      I decided to convert my other car too!
                      2 Chargers aa1.jpg
                       
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                      • Kern Dog

                        Kern Dog FBBO Gold Member FBBO Gold Member

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                        I ordered Hella headlights the other day and they were on the porch this morning.
                        The high beams are designated H1.

                        Hella 3.JPG

                        The bulb setup in these is strange. There is only one wire to the bulb and a separate ground. Hella supplies the wires .
                        The bulb is placed in the back and held in with this spring clip.

                        Hella 6.JPG

                        Hella 16.JPG

                        The gray boot slips over the housing and actually fit in my stock headlight bases.

                        The outer headlights are designated H4 and they use a high and low beam.

                        Hella 7.JPG Hella 8.JPG

                        The bulbs can only go in one way.
                         
                      • Kern Dog

                        Kern Dog FBBO Gold Member FBBO Gold Member

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                        I don't usually wear gloves but the rumor is that oils from skin or anything can cause the bulbs to fail. It may be BS, who knows for sure.

                        Hella 9.JPG

                        Hella 10.JPG

                        Waiting for night time to adjust and report back.
                         
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                        • kiwigtx

                          kiwigtx Trendsetter Staff Member FBBO Gold Member

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                          That is quite true. Wearing the gloves is a great idea.
                           
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                          • Kern Dog

                            Kern Dog FBBO Gold Member FBBO Gold Member

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                            The lights look closer to stock than any LED one looks.

                            Hella 17.jpg Hella 18.jpg
                             
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                            • Kern Dog

                              Kern Dog FBBO Gold Member FBBO Gold Member

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                              Pretty bright. It isn't quite dark yet but I have to make dinner....My Granite Bay famous "Butt-fire" tacos!

                              Hella 19.jpg Hella 20.jpg
                               
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                              • blue69runner

                                blue69runner Well-Known Member

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                                Sweet now you got me to thinking. Yes Halogen bulbs will burn the class where you touch them. Don't touch them with your finger's. You can clean them with rubbing Alcohol. Best to ware clove's. LOL. Hey they are bright enough. Not like the old blubs Hey.
                                 
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                                • 1 Wild R/T

                                  1 Wild R/T FBBO Gold Member FBBO Gold Member

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                                  Take it for a drive & tell us what you think.... The cut-offs in the lens are pretty effective...
                                   
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