Severe overvoltage issue By one1 (Read 1,214 times)

[one1]

I started the 260 today and after a few seconds it died. I had to rev it to keep it going and then the dash lights went out and headlights. The city lights stayed on, oddly enough. Then I blew the headlight and 2 dash lights. I knew immediately it was spiking voltage, so I tested and sure enough almost 20 volts at the dash lights.

How do I determine if it is a rectifier, resistor, or stator?

Key points:

• List item 1
• List item 2
• List item 3

[one1]

I also have these 2 diodes that have been looking toasty lately and idk what they are for.

[jct842]

Go into our library and start reading, there are a lot of answers there. Doubt if any problems with stator. Do the listed check out for stator/regulator. You should be able to match up a generic diagram to trace out the current paths.

[tvnacman]

I'm thinking regulator, post pics of the regulator and the wires and colors.

John

[one1]

Thank you, I have new information. Now today I waslked outside and the dash lights, city lights, etc won't turn off. I turned the scoot off and they are still on. Is this a regulator driven circuit?

[one1]

Jul 24, 2016 5:44:42 GMT -6 tvnacman said:

I'm thinking regulator, post pics of the regulator and the wires and colors.

John

It's the two plug regulator on 250/260s.

[one1]

These are the diodes I have in the scoot and there are 2 of them. IDK what they are in the circuit for, but I think these are my culptir. One os shorted, the other is open, so both are useless and melted. www.ebay.com/itm/ONE-RELAY-RECTIFIER-REGULATOR-DIODE-for-Honda-GL1000-GL1100-GL-1100-1000-S5H-02-/400790926146?hash=item5d51003342:g:FkoAAOSwF1dUQjDE&vxp=mtr

[tvnacman]

the diodes will not give you overvoltage.

[one1]

They are check diodes that in series function as a regulator before looping back to the battery. They could oscillate, but I'd like more Info

[one1]

So here's the issue with the voltage. It's idling at 19v at the lights, blown every single one of them. Revving to 30v before the voltage cuts out completely, which I'm sure is the regulator giving up and shutting off. The battery voltage doesn't change at ALL ever, which makes sense because the check diodes are what regulates the voltage back to the battery and they are toast. My new ones will be here tomorrow.

NOW, that said.... "I" think the system can oscillate because I suspect one of the check diodes is tied to ground (theory). The problem here is that in a normal scoot the regulator is the only part. This one has a 2 plug regulator instead of a 1 plug, it's huge comparably in size. It has a resistor. It has 2 check diodes. I haven't been able to talk to someone familiar with this setup to help troubleshoot the overvoltage. I'd happily order a regulator if I knew that would fix it.

CHECKLIST:

Since the stator is putting out, is there ANY way it could be on the fritz and be shooting too much into the regulator?

Since the check diodes are out of the system, is there nay way it could be oscillating without them, or needing them to send the extra voltage back to the battery to complete the circuit?

[one1]

Regulator in my 260 beside the one from my 80.

Positive test lead of voltmeter on yellow wires. Using negative of voltmeter I get nothing. When reversed I get:

Green 500
Black 0
Red 0

[jct842]

Go back to square 1. Do the stator test as outlined in the library, if it is within specs replace the regulator.

[one1]

Kinda moot at this point. The regulator failed the test outlined in this scooterdoc.proboards.com/thread/10797/rectifier-diode-testing

I got the right readings for green, but nothing on red.

I'll test the stator to make sure it wasn't the original issue that fried the VR, diodes, and bulbs.