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SouthLouisiana121333 
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Joined: 06 Apr 2024
Location: Louisnana
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 Topic: B Headlight Wiring Harness
Posted: 22 Apr 2024 at 7:11am |
I recently bought a restored B. One of the things that was not completed was the headlights and the wiring thereof. My question is, is there anywhere I can buy the wiring harness for the 12V headlights only? I see that there are complete wiring kits for the B's but I don't need all of that, especially not for $200.
If there isn't a premade kit, can anyone guide me in the right direction in the way of the correct supplies needed for a 12V system? Basically, everything between the light switch and headlights. I would like to run the wiring the way it would have originally been ran as well.
All of your insight is greatly appreciated!
Edited by SouthLouisiana121333 - 22 Apr 2024 at 7:12am
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
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Posted: 22 Apr 2024 at 8:07am |
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You would need a toggle switch -- ON_OFF on the light box.. YOu need ONE WIRE that runs up to the radiator, then splits to go to each head light.. Other side of the bulb is grounded to the case and tractor sheetmetal... YOu might check the harness to see if there is a SPARE wire tied to the back of the radiator or in the thermostat area.. Harness might have had the wire, just not used.
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Like them all, but love the "B"s.
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steve(ill)
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Posted: 22 Apr 2024 at 8:11am |
Since you are 12v, you dont have the ORIGINAL light switch... You would just use a toogle for the NEW lights... Here is an ORIGINAL drawing showing the ONE WIRE FEED..
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Like them all, but love the "B"s.
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SouthLouisiana121333
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Posted: 22 Apr 2024 at 9:28am |
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Thanks Steve for all of that information. That’s very helpful.
About the light switch: I don’t currently have any light switch. So, what you’re saying is the 3 position light switch would not work for a 12V system? Not even a new one from Steiner ? If so, that’s a real bummer as I wanted to keep everything looking as original as possible.
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steve(ill)
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Posted: 22 Apr 2024 at 9:42am |
yes, you could use the ORIGINAL switch just for the lights.. The ORIGINAL switch will have a couple more terminals on it and a resistor as it was used to regulate the current output of the old generator... It will have 3 positions... OFF, LOW, HIGH... you just need to pick a couple terminals to just turn the lights ON in one positons..
You would run one wire from the amp meter to the light switch ( shown in brown), and one wire up to the lights ( shown in red).... the 3 positions switch would only work when pulled to the middle LIGHT position.
Edited by steve(ill) - 22 Apr 2024 at 12:37pm
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Like them all, but love the "B"s.
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Scott B
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Posted: 22 Apr 2024 at 9:54am |
You could also check with Steve @ B&BCircuits.Com. He does alot of that work and has light switch parts. Has Steve (Ill) says, it's a pretty straight forward 1 wire run. Good luck.
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D17 Series 1
Allis B- 1939
Allis B- 1945
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SouthLouisiana121333
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Location: Louisnana
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Posted: 22 Apr 2024 at 12:38pm |
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Thanks for the info, I will check that out!
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SouthLouisiana121333
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Posted: 22 Apr 2024 at 12:40pm |
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Steve, I’m pretty handy at most things but I’m a dummy when it comes to electrical. This may be a dumb question but why would you not be able to have a low and high beam with the 3 position switch?
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steve(ill)
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Posted: 22 Apr 2024 at 12:47pm |
Well, if you have two beams, you would need two wires running up to the front lights.. The HI- LOW on the switch was for generator charge rate, not lights.. "MOST" tractor lights are only low beam, one filament.
Some of those aftermaerket switches use BIG RESISTORS and dont fit the small ALLIS box to well... If you get one of them, remove the reisistor, you dont need it..
IF you call STEVE at B&B and want his help, he can makeup a switch without the resistor on it ( to simplify) and he will mark the two terminals for POWER and LIGHT that you connect to.... he can probably fix you up with a NEW TYPE 2 terminal switch that looks the same externally to the Original switch..
Edited by steve(ill) - 22 Apr 2024 at 12:56pm
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Like them all, but love the "B"s.
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HudCo
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Posted: 22 Apr 2024 at 1:08pm |
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i think steve at b and b has a harness
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Steve in NJ
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Posted: 22 Apr 2024 at 7:32pm |
If you just need the Headlight circuitry with a switch, there is a guy that offers that. Me. Email me or give me a call. I can fix you up with what you need to complete just the Headlight circuitry along with a fused Headlight switch. You can use the 3 position switch for 12V's, just for the lighting side only! Steve@B&B customcircuits@gmail.com
Edited by Steve in NJ - 22 Apr 2024 at 7:33pm
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39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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