No voltage at headlight - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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Where does this wire go?
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post #1 of 13 (permalink) Old 08-09-2015, 01:17 PM Thread Starter
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No voltage at headlight

Yesterday my headlight stopped working. I have no voltage at the headlight. I have no voltage at the high beam switch. Neither the low beam nor high beam work. The hazard lights work, the turn signals work, the fuses are all good and have been checked with a volt meter. I do have voltage at the fuse. What could the issue be?
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post #2 of 13 (permalink) Old 08-09-2015, 01:34 PM
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The headlight is activated by a relay that is triggered by your stator.

I'd go ahead and test the stator @ the 3 leads coming from the generator housing.

You want to see 50-70VAC between all 3 legs @ higher rpms (4k+). You also should have no continuity to ground on all 3 legs.

Perform these tests both hot and cold for most accurate results.

1986 Kawasaki Vulcan 750
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post #3 of 13 (permalink) Old 08-09-2015, 01:57 PM Thread Starter
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Hi. The stator seems fine. I also removed the junction box and tested the tracers. Repaired one trace that looked a little heated. Still no joy. Which relay and where? I see the turn signal relay. Is the other relay inside the jb?
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post #4 of 13 (permalink) Old 08-09-2015, 02:17 PM Thread Starter
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This trace goes to the fuse for the headlight so I was full of hope, but I still have nothing. My voltage on the bike is a proper 13.5 running.
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post #5 of 13 (permalink) Old 08-09-2015, 04:08 PM
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are you getting power on the solid blue wire at the Reserve Lighting Unit?
How about power on the Black with Red Tracer at the RLU?
Also Power on Blue with Violet Tracer at the RLU?

If you aren't getting power on the last two wires, but are on the first.. the RLU is bad.. if no power on the solid blue wire, you have a problem at the JB
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post #6 of 13 (permalink) Old 08-09-2015, 07:52 PM
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I had the same problem mine ended up being the reserve lighting unit which I bypassed until I got a replacement in.
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post #7 of 13 (permalink) Old 08-09-2015, 11:12 PM Thread Starter
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I'm testing it right now how do i bypass it

Edit. No power on any wired. How do I bypass this to get home? It's night and I need to ride

Last edited by One1; 08-09-2015 at 11:20 PM.
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post #8 of 13 (permalink) Old 08-09-2015, 11:54 PM
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Quote:
Originally Posted by One1 View Post
I'm testing it right now how do i bypass it

Edit. No power on any wired. How do I bypass this to get home? It's night and I need to ride
See if this helps, especially post 39 and 40
https://www.vn750.com/forum/showthrea...t=22632&page=4

JM2001

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post #9 of 13 (permalink) Old 08-10-2015, 12:21 AM Thread Starter
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Thank you I was busy while you posted that jumping the wires out like it says to and that didn't work so I went back and did the other fix where you take the blue wire from one connector and stick it in the empty hole and that worked just fine so my headlight is working now I guess my relay inside the junction is bad
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post #10 of 13 (permalink) Old 08-10-2015, 12:48 AM
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yes, Bad relay... kc2dgq used to repair them... if he is still a round he might have a source for relays.
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