KGa Posted August 13, 2012 Report Share Posted August 13, 2012 Hi. So im rewiring the entire car, came around to the headlights and did it just like the original schematic. (or at least i think so..) Problem then is than there is some leakage voltage over the H4 low/high beam so that the High beam H1 bulb starts to glow slightly. Now ive tried all kinds of configurations and its a mess any way i try. I wonder if anyone who have done this could present a sketch? Currently i have two wires goint in from the bay to be used as + to high & low. Both bulbs have been earthed in the bay. I though simply to use two relays so that one wire would be powered and the other isolated. But as i said, no matter what i tried this wont work as the other bulbs starts to glow/light up also. Ive spent two nights reconfiguring the wires i all the ways i could think of but im back at square one. Hope someone have some experience and a sketch would deffo save the day (and my mood hehe) Quote Link to comment
wayno Posted August 13, 2012 Report Share Posted August 13, 2012 What kind of vehicle are we talking about here? Square or round headlights? Have you already wired the brights indicator in the dash? Quote Link to comment
KGa Posted August 14, 2012 Author Report Share Posted August 14, 2012 Late at night.. lets try to clarify. Its a 510, but let me mention again that ive redone all wiring, so i will rebuild as whatever way it has to be wired.. I wont (or at least do not have to) use the high beam indicator in the dash. But, simplified set apart from the specific car I need to know how to wire two H4 bulbs in paralell, where only one bulb shall be used with low beam, but both with high beam. How to do this without getting "leakage voltage" trough the bulbs which leads to both bulbs lighting up? Quote Link to comment
banzai510(hainz) Posted August 14, 2012 Report Share Posted August 14, 2012 Should have leeft the stock wiring in place and Added a H4 wire harness.The stock wire harness you tell the new Battery powered harness to turn ON using a relay http://www.4crawler.com/4x4/CheapTricks/Headlights.shtml Now for this leakage. What type of lamp housings you using? Cibie, Hella,Boesch. I remeber back in the day the older lamp housing they would ground the bulb out to one side and cause the light to come on. As datsun 510s use a switchable gorund sytem. Meaning +12vpower was already to the plug already and they lights would come ON.. They need to be isolated. Try removing the housing fom the car but with the Plug still installed. see it the light shuts off. But, simplified set apart from the specific car I need to know how to wire two H4 bulbs in paralell, where only one bulb shall be used with low beam, but both with high beam. IS THIS RIGHT????YOu want both elements in the H4 bulb to be on???? I think this would get too HOT. I dont reccoment this Quote Link to comment
alabama_lowlife Posted August 14, 2012 Report Share Posted August 14, 2012 When they both light up are they slightly more dim than they should be? I'm thinking that your ground is not getting sufficient contact. I've seen several instances where 2 bulbs or filaments that share a ground path will both illuminate dimly when the ground is bad. Quote Link to comment
KGa Posted August 14, 2012 Author Report Share Posted August 14, 2012 Yes, i know how the original harness was wired, and that the lamps were ground switched wont mean the big difference (will affect how the relays are wired) And I meant both head lamps (ie 4in total) will have the high beam wires powered, and for low beam only the two outer lamps with the low beam wire powered. Problem is that the H4 bulbs, when you have a second H4(or H1) in parallel with the main lamp, and this one has one side always grounded(or powered) and then set power(or ground) to the low beam wire of the first H4 you will have a circuit from the input side of the low beam trough the high beam wires and as such they will start to light up. (voltage will be distributed over them as they are in series, but they still will light up. And when set to high beam there will be some light in the low beam also) (i checked that the lamps do not have any "frame leakage") I think i will just need a more advanced relay setup, so that when low beam is on the secondary H4 is fully isolated. that means one more relay and more wires from the relays inside and to the lamps. Just though maybe someone had done this setup from scratch on some car sometime and could present a schematic :rolleyes: I`ll have to start drawing it up and I will solve it, just takes more time than getting the know-how from someone :hug: Quote Link to comment
DanielC Posted August 15, 2012 Report Share Posted August 15, 2012 Maybe this will help. Because we live in a world populated with switched ground 510's, forget calling one terminal ground. Lets call it "common". The common terminal connects to both filaments. On a 510, power is applied to this terminal, and the headlight relay, and the light switch grounds either the low beam, or the high beam terminal. Then either the high, or the low beam lights up On a 521, the headlight switch, and relay apply power to either the high beam or the low beam terminal, and the common terminal is grounded. Again, either the high, or the low beam lights up If you hook either the low beam, or the high beam terminal to power, and then ground the high beam, or the low beam terminal, the common terminal connects the two filaments in series. Then both filaments, or "beams" of the headlight glow dimly Quote Link to comment
banzai510(hainz) Posted August 15, 2012 Report Share Posted August 15, 2012 putting light elements in series will dim them. Means 6 volt drop across each light element. will not be as brite. Im really confused on what your doing that a H4 harness or a H4 H1 haness cant do. I would have used a H4 harness (to battery/or starter lug) and you would have 4 lights going when HIGH BEAM is switch. at FULL POWER Done. the H4 1 set headlamp set up uses 2 relays low and high. for the outer lamps stock 510 highs the wiring is OK up to 50/55watts. if you want more power for the HGIGHS youl will get a 2 set. outer and inner lamps this will be a 3 relay set low 1 relays outer lamps high 1 relay outer lamps 1 relays inner lamps Quote Link to comment
KGa Posted August 16, 2012 Author Report Share Posted August 16, 2012 Hi. So i have finished this and it working. :D I wired two relays, relay 1 is switching + between low and high beam.(controlled by the steering column arm) (the COMMON of the H4 ref above picture is always grounded) Relay 2 is "passive" and switches on when high beam is set, this relay then connects ground to the secondary high beams. This way the high beam bulbs are always fully isolated and there will be no voltage over them when set to low beam. (low beam is isolated when set to high since the + wire is then open at relay 1) The problem all along is not how to wire the low/high beam bulbs, but having another bulb in parallel that shall not be lighted. The problem would be the same with switch positive or negative. Take note that this is NOT directly applicable to rewiring headlights to the original 510 harness. This case is/was a full rewiring from scratch, only using the original switches of the 510. I have a drawing if someones interested, and sorry i just seem to have a really hard time explaining this, just as it took me some time to figure out how to make it work. Guess there are other solutions but at least I got it working :) Thanks for all input! Quote Link to comment
banzai510(hainz) Posted August 16, 2012 Report Share Posted August 16, 2012 How about a photo of this car? I used to email a countryman of yours he has a 510 Yngve Tidemansen Quote Link to comment
71sr20510 Posted September 9, 2012 Report Share Posted September 9, 2012 im in the middle of rewiring my 510 and would love to see the schematic you have for your headlights. It would be so much help Quote Link to comment
Turbojovi Posted December 23, 2012 Report Share Posted December 23, 2012 What size wire are you using ? Quote Link to comment
ggzilla Posted December 23, 2012 Report Share Posted December 23, 2012 This is the stock 4-headlamp wiring for North America is: 2 low beams & 4 high beams. They are wired in parallel, not in series. Quote Link to comment
nismosilvia Posted January 7, 2013 Report Share Posted January 7, 2013 Hans could you post the part number for the h4 harness you used please. Quote Link to comment
banzai510(hainz) Posted January 7, 2013 Report Share Posted January 7, 2013 http://www.4crawler.com/4x4/CheapTricks/Headlights.shtml#OnLineOrdering Quote Link to comment
nismosilvia Posted January 8, 2013 Report Share Posted January 8, 2013 That guys out of stock. I'm getting super confused with this whole 9004/ h4 light when ordering. The light I got at the jy have 9005 lights that are two prong , I'm guessing this is the h4 part of the equation? Found this on another site is this the correct harness? http://www.classicindustries.com/impala/parts/mx01133.html Quote Link to comment
banzai510(hainz) Posted January 8, 2013 Report Share Posted January 8, 2013 That looks like it will work. Youll want the H4 harness. Im just confussed as it says its a 4 light harness. Most times it will have 3 relays if a 4 light system 1 relay for low(outer light). 1 for the HIGHS (outer light) then 1 relay for the inner high beams. 25$ is a good price either way. Made in China but so is mine and I paid 39$ I think maybe on relay has 2 set of contacks but I cant tell. your on your own. 1 Quote Link to comment
nismosilvia Posted January 8, 2013 Report Share Posted January 8, 2013 Thanks hainz you da man Quote Link to comment
banzai510(hainz) Posted January 8, 2013 Report Share Posted January 8, 2013 remember 510s are switchable ground.This harness makes it switchable power My harness was a drop in. I dont know if this is more for USA made cars and might be switchable power trigger.My harness has a 3 contack connector half way to make it switchable ground or power.( I had to do this on my 521) just a word of warning. Quote Link to comment
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