Backlighting on gauge cluster - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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Where does this wire go?
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post #1 of 5 (permalink) Old 01-28-2020, 11:22 AM Thread Starter
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Backlighting on gauge cluster

Hi everyone-

I've searched around for an answer and have no come up with anything yet on here. Should my speedo, tach, fuel gauge and temp gauge be backlit? I'm currently rebuilding the bike and wasn't sure what the proper behavior of the cluster is.

Thanks!
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post #2 of 5 (permalink) Old 01-28-2020, 12:07 PM
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tach, spedo, and fuel should be backlit. I think the temp gauge is lit by the same bulb as the spedometer.
The cluster lights' v+ wire coming out of the junction box is shared with the front signals, if you're in the middle of troubleshooting.

1992 US-nonCA * tuxedo mod * r/r relocated

Vulcan slang for newcomers
Service Manual Download
Wiring Diagram + annotations * still undergoing revisions, but still more useful than the generic one. Let me know if you find mistakes or think something additional should be added
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post #3 of 5 (permalink) Old 01-28-2020, 12:12 PM Thread Starter
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Ok, got it. Now, my front signals, high beam and low beam work just as they should. Could there be a short in the harness somewhere, leading to no lighting?

Thanks, Thorn. I'm a newbie to bikes in general.

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Originally Posted by Thorn View Post
tach, spedo, and fuel should be backlit. I think the temp gauge is lit by the same bulb as the spedometer.
The cluster lights' v+ wire coming out of the junction box is shared with the front signals, if you're in the middle of troubleshooting.
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post #4 of 5 (permalink) Old 01-28-2020, 01:46 PM
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Seems likely that you've got a break in a wire somewhere, most likely in the wiring harness where it transfers from the body of the motorcycle to the handlebars, where it flexes a lot. Another common failure point is where a wire goes into a molex connector, but since ALL of your dash lights are out, and they use different connectors, the more likely culprit is a wire in the harness, which is not a particularly easy fix.

If you look in my signature, there's a link to a wiring diagram. I don't think it's accurate with regards to where or how many physical splices are in the physical harness, but it'll give you a good overview of what's electrically connected to what.

It's possible but unlikely that all the bulbs have burned out.

1992 US-nonCA * tuxedo mod * r/r relocated

Vulcan slang for newcomers
Service Manual Download
Wiring Diagram + annotations * still undergoing revisions, but still more useful than the generic one. Let me know if you find mistakes or think something additional should be added
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post #5 of 5 (permalink) Old 01-28-2020, 06:42 PM Thread Starter
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Thanks. I believe the gauge cluster used to light up, so I'm thinking a break in a wire is more likely too. I'll check out the diagram.

Quote:
Originally Posted by Thorn View Post
Seems likely that you've got a break in a wire somewhere, most likely in the wiring harness where it transfers from the body of the motorcycle to the handlebars, where it flexes a lot. Another common failure point is where a wire goes into a molex connector, but since ALL of your dash lights are out, and they use different connectors, the more likely culprit is a wire in the harness, which is not a particularly easy fix.

If you look in my signature, there's a link to a wiring diagram. I don't think it's accurate with regards to where or how many physical splices are in the physical harness, but it'll give you a good overview of what's electrically connected to what.

It's possible but unlikely that all the bulbs have burned out.
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