no headlights, brake lights, horn, or tach reading - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 7 (permalink) Old 08-19-2012, 01:33 PM Thread Starter
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no headlights, brake lights, horn, or tach reading

Just bought a 94 vulcan 750. Bike starts right up with a touch of the button but I have no headlights, brake lights, horn, or tach reading. The bike idles fine but sputters under throttle. All fuses are fine. Checked battery voltage with bike off, it reads 12.4 volts. Checked the voltiage with bike running at idle and it reads 18.5 volts. I ordered a new reducer/rectifier and plan on relocating it to behind the passenger footpeg. Could the lights and throttle issues be the same problem and will a new reducer/rectifier solve my troubles? Lookin forward to start ridin, thanks for any help.
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post #2 of 7 (permalink) Old 08-19-2012, 02:43 PM
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sounds like the headlight relay inside the Fuse Box is gone south.. try moving the blue wire from pin 8 to the open hole.. (Search Junction Box Mod or Blue Wire Mod)
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post #3 of 7 (permalink) Old 08-19-2012, 04:18 PM Thread Starter
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Thanks for getting back so soon. Won't be able to work on the bike until tomorrow night but I ll be sure to keep your advice in mind.
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post #4 of 7 (permalink) Old 08-21-2012, 01:36 AM Thread Starter
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Replaced and relocated the voltage reducer today. That did not fix my lighting trouble. Also did the blue wire mod in the junction box, no help there either. Any other ideas out there?
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post #5 of 7 (permalink) Old 08-21-2012, 08:58 AM
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if blue wire mod doesn't work, then you have issues with the Reserve Lighting Unit (little square plastic thing on the back of the Battery Box) and a problem with your front ignition Coil.
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post #6 of 7 (permalink) Old 09-09-2012, 11:58 AM Thread Starter
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Bike is all fixed. Lighting and power issues were caused by battery acid erroding the back of the junction box. Ran a jumper wire to the box and everything worked even the tach. The throttle issue was corrected simply by replacing the air filters. Thanks for any input, now its time to ride.
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post #7 of 7 (permalink) Old 09-09-2012, 12:10 PM
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Welcome to the Vulcan madness Mc.
(Please pardon the pun on your forum nickname
I am supposing you are of Scottish heritage

Glad to hear the electrical gremlims were so easily diagnosed and banished from the new-to-you scoot.

Where ya at?
Go to the User CP at the header of every page and fill out your profile.
Your location will show on every post you make. It can be as general or specific as you choose to disclose.

Many of us use the signature line to give info about our motorcycles, mods, maintenance, etc. It makes it easier to get answers to questions about problems we are having if we don't have to detail any changes from stock every time.

Check out the ten things link below.
Check your rear splines between driveshaft and final drive, and between final drive and wheel hub ASAP, as per fergy's spline lube write-up.
Good directions with pictures are in fergy's thread:
https://www.vn750.com/forum/showthread.php?t=17274

Checking NOW could save you an expensive repair it they are not properly lubricated.

Check and clean the rear brake drum and shoes while the wheel is off. Lube the pivot points too with high temp or brake specific grease.

Gordon

1991 VN 750 -"Cosmic Lady" or "Bad Girl"?
Purchased May 16, 2008
Approx.19,300km (12,000 miles)

H-D windshield
Relocated R/R
MF-AGM battery
Fiamm Freeway Blaster horns
F&S luggage rack and engine guard
Kury Offset Hiway pegs
July 13, 2016, Riding on the DARKSIDE now, Classic Radial 165/80-15


TOP TEN THINGS A NEW RIDER/OWNER SHOULD DO. Click on link.
https://www.vn750.com/forum/11-vn750-general-discussion/9127-top-ten-items-you-would-suggest-new-owner-do-his-new-ride.html

Last edited by OlHossCanada; 09-09-2012 at 12:49 PM.
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