dead fuel gauge - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 16 (permalink) Old 05-30-2007, 01:54 PM Thread Starter
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Question dead fuel gauge

Fuel gauge has never worked since I've owned my bike. Not a huge deal since I tend to use the trip odometer to prevent running out of gas - but an annoyance that I'd like to correct.

Is this a recurring problem for our bikes, or am I just one of the "lucky" ones?

Any ideas if this is electrical or fuel-system related? Seeking suggestions on how to troubleshoot or repair - thanks.

PA750

'93 VN750 A9
MF battery
Kaw rear rack
Coolant tank cover
HH bag supports
River Road Compact Slants
National Cycle shield
Knifemaker Floorboards
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post #2 of 16 (permalink) Old 05-30-2007, 03:43 PM
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I'd check the electrical leads first - they hook up to the wiring harness just behind the fuel tank (I think it's a two-pin connector - it's small). See if there are any cracks or breaks in the wires, if the pins are really connected, etc. (You might pull the tank and check the wires where they connect underneath the tank as well). Clean the connections well, and put in a little dialectric grease. Alternatively, and if I'm not mistaken ,the fuel gauge works by an electrical float that sits on the gasoline and sends a signal (analog, really) back to the gauge. Maybe someone else has disassembled this? Or just replaced it? I'm getting my tank ready for painting so can take a look at the assembly tonight and let ya know what's going on under there.

C
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post #3 of 16 (permalink) Old 05-30-2007, 04:46 PM Thread Starter
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Thanks, Cindy. Will check the el. connections as you suggested. And I believe you are correct re: a float in the tank - recall reading that somewhere. Not sure if it was tinkered with in the past - no outward signs that it might have been - but you never know.

Appreciate any insights you find after looking at your assembly as well.

PA750

'93 VN750 A9
MF battery
Kaw rear rack
Coolant tank cover
HH bag supports
River Road Compact Slants
National Cycle shield
Knifemaker Floorboards
23,800 mi
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post #4 of 16 (permalink) Old 05-30-2007, 04:51 PM
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Originally Posted by pa750 View Post
Fuel gauge has never worked since I've owned my bike. Any ideas if this is electrical or fuel-system related? Seeking suggestions on how to troubleshoot or repair - thanks.
My fuel gauge suddenly quit working one day. I began fretting, fearing something major had gone wrong with my electrical system. As it turned out, a simple connector (white, I think) had come undone while I was installing a new maintenance free battery. Pop your seat open and see if there is a plug (near the fuel tank) that has come undone.

EZC


Last edited by EasyRector; 05-31-2007 at 05:26 PM.
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post #5 of 16 (permalink) Old 05-30-2007, 04:58 PM Thread Starter
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Will do - thanks for sharing.

PA750

'93 VN750 A9
MF battery
Kaw rear rack
Coolant tank cover
HH bag supports
River Road Compact Slants
National Cycle shield
Knifemaker Floorboards
23,800 mi
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post #6 of 16 (permalink) Old 05-30-2007, 09:33 PM
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Pics of fuel sensor

https://www.vn750.com/photopost/showgallery.php?cat=556

Here are the pics I took this evening. There's a "gasket" (plastic cover) that sits over the whole assembly under the tank. Just pop this off. Under that you'll see where the electrical leads from "above" should attach to the sensor itself. CHeck to make sure these are on, clean, etc. Finally, there's the float ball - Clymer's warns about the arm getting bent and stuff, but if that were the case with yours, most likely you'd get bad readings, not no readings. SO my money's on your electrical bits.

Good luck!

C
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post #7 of 16 (permalink) Old 05-31-2007, 06:12 AM Thread Starter
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Fantastic - appreciate the pix and suggestions. Grabbed some el. parts cleaner and dialectric grease on my way home last night - so I know what I'll be doing this weekend! Thanks so much for sharing - I'll let you know how it goes.

PA750

'93 VN750 A9
MF battery
Kaw rear rack
Coolant tank cover
HH bag supports
River Road Compact Slants
National Cycle shield
Knifemaker Floorboards
23,800 mi
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post #8 of 16 (permalink) Old 05-31-2007, 07:07 AM
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Quote:
Originally Posted by pa750 View Post
Fantastic - appreciate the pix and suggestions. Grabbed some el. parts cleaner and dialectric grease on my way home last night - so I know what I'll be doing this weekend! Thanks so much for sharing - I'll let you know how it goes.
Excellent. I bet it's something straightforward and easy - that's usually the way these things go. (As one of my colleagues here likes to say about some dunderhead users of electronic equipment, such as digital tape recorders, "Best results can be obtained in the 'on' position.")

C
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post #9 of 16 (permalink) Old 05-31-2007, 09:47 PM
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When I was an electronic tech in the USAF, we had a pilot having problems with a piece of communications equipment. The equipment had a 3 position switch, CLR, CYPH, and OFF. He was complaining the equipment didn't work in the official position!!!!

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post #10 of 16 (permalink) Old 06-01-2007, 06:56 AM Thread Starter
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Sounds like something I would do.

Fortunately, to the best of my knowledge, there is no "OFFicial" position for the fuel gauge......

PA750

'93 VN750 A9
MF battery
Kaw rear rack
Coolant tank cover
HH bag supports
River Road Compact Slants
National Cycle shield
Knifemaker Floorboards
23,800 mi
pa750 is offline  
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