Charging system issues: Vn 750 1995 - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 3 (permalink) Old 10-27-2018, 07:25 PM Thread Starter
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Question Charging system issues: Vn 750 1995

Hello,
I have this 1995 Vulcan 750 and it has run into some electrical problems.
The head light, tail light, neutral indicator light and fuel level indicators have stopped working recently. Only the turn signals were working. I tried replacing the fuses to no avail. Soon after my battery died too and is not charging up right on the trickle charger. When I used a jump starter with the busted battery, all of the electronics worked, but the engine keeps cutting off a few seconds after the jump starter is removed (probably due to the busted battery unable to maintain voltage). I am expecting it to be a stator problem but am unsure. Please provide any additional feedback on how to trouble shoot or what the issue might be. Thank you.
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post #2 of 3 (permalink) Old 10-28-2018, 02:27 AM
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Can't say exactly why the lights aren't working, but it could very well be because the rest of the electrical is dead.

So, your battery won't hold a charge. Is this a wet cell or an AGM? If its a wet cell, are the electrolytes still in the battery? Do you have a bad cell? If AGM, the battery is probably toast

More bad news...If your bike starts on the jump pack, but shortly dies afterwards, your charging system is probably toast as well. There's a chance a really screwed up battery could be inhibiting the flow of electrons, but typically even if you have a dead battery, if you can get it started, the charging system should keep it running.

So, what I'd do:

Step 1: take some measurements of the battery. If its at 9v or 10v, its probably toast. If it is 11v or better, put it on the trickle charger for a bit, and measure the voltage again and see what you get. Around 13v? Thats a good sign. If you get a good voltage after charging, try starting the bike with just the battery 2 or 3 times, and check the voltage again. Is it below 12v again? Probably toast, can't hold a charge

Step 2: replace the battery. Go with an AGM battery

Step 3: Start the bike. let it warm up, and rev it up to 3000 RPM or so and check the voltage while running at 3000 RPM. Are you getting 13.5v+? If so, thats a good sign. Try 6000 RPM. Closer to 14v now? Good. If its around 12.8v or so, your charging system is dead.

Try some of these things and report back. If your charging system is dead, we can go from there
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post #3 of 3 (permalink) Old 10-28-2018, 04:00 AM
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Agree on post #2.

Quote:
head light, tail light, neutral indicator light and fuel level indicators have stopped working recently
May be a bad ground somewhere? Check at the battery. Black/Yellow stripe wires are all grounds.

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