90 Racer Vespatronic stator yellow wire

[cds]

Hello all,

Another weekend passed and another step to my 90 Racer being completed. Wired up Vespatronic and fired up first kick. Timing set with timing light and running sweet BUT no lights, horn etc.

Tested from switch and found live feed to be grounded to earth. Tested all the way to junction box where it is connected to the yellow wire from my stator. According to my diagram the yellow stator wire is the main feed for everything in the scoot coming from the switch (lights, horn).
On disconnecting all, and putting my multi-meter on the yellow wire (buzzer only for continuity not ohms), it buzzes when put to earth.

Is that right or am I missing something here?

any help/advise appreciated.

cheers
Charlie

[jbcollier]

Yes, a continuity tester can't check low impedance coils. It shows it's grounded because it is grounded on the other side of the coil. Does your racer have a "short-to-ground" for off electrical system? The ss90s did. In that case you have to change the wiring and switches so it's a switchable power system.

[cds]

Hi JB

I'm not sure about that.. Can you elaborate. i must admit I have followed the wiring diagram for a Primmy assuming it would be the same?

I there another wiring diagram I should have followed?

I have a new loom and also bought the new switches for the 12v Vespatronic kit  (main switch and brake switch) from SIP.

When all connected, I am getting no live to the main switch which seems to be fed by that yellow wire.

I have a multi meter. is there any readings I should check. I haven't got my rear light connected but don't think that would make a difference. 

You seem to know your stuff looking at previous threads. thanks for responding.

Charlie

[jbcollier]

Here's a short to ground system for the brake light:

scooterhelp.com/electrics/wiring/V9SS1.pdf

When the brake pedal is released, it pushes against the brake light switch and the normally-open switch is close so the brake light power is shorted to ground. When the pedal is depressed, the switch opens, power is no longer shorted to ground and the brake light comes on.

You need a normally closed switch and slight rewiring.

Check the horn switch as well. It should be normally open: push to make contact.

[cds]

yes i can see that. 

I think I got the right switches as I ordered what SIP book said I needed. Maybe its not right. 

I though I'd see a reading from the yellow wire going to the horn/light switch but it seemed dead.

[jbcollier]

Take the switches out and look at/test them. You can see the horn contacts on the back of the handlebar switch. They should be normally-open, or "push to make." The brake switch should be normally-closed.

I find a better way to test things is to use a battery. Hook it up one at a time to the harness power wires to test each circuit. With everything off, there should be no draw so use a simple test light at first. If the light is on, you have a short.

[cds]

Got it.

I have a battery and test light so can do some fault finding.

Appreciate your help.

I'll keep you posted on progress.

many thanks

Charlie

[madmax]

May 25, 2020 6:19:06 GMT cds said:

Hello all,

Another weekend passed and another step to my 90 Racer being completed. Wired up Vespatronic and fired up first kick. Timing set with timing light and running sweet BUT no lights, horn etc.

Tested from switch and found live feed to be grounded to earth. Tested all the way to junction box where it is connected to the yellow wire from my stator. According to my diagram the yellow stator wire is the main feed for everything in the scoot coming from the switch (lights, horn).
On disconnecting all, and putting my multi-meter on the yellow wire (buzzer only for continuity not ohms), it buzzes when put to earth.

Is that right or am I missing something here?

any help/advise appreciated.

cheers
Charlie

The yellow wire is the lights feed and connects together with the lights wires from the loom and then to the regulator, providing you have a 12v loom. Not sure if is the same for a 6v one.

[cds]

I knew it was the lights. i have a 12v conversion loop with vespatronic. 

As JB said, I will check all the switches this weekend and make sure they are all the correct type (shutter or opener).

I'll hook up test light from that yellow wire and make sure a least that is being powered.I'll check the switches and then start checking my loom connections logically.

Tell you what - someone needs to make an easy to follow video on installing vespatronic with the various looms and scoots.Might be me when I get this sorted so nobody struggles in future. I'd show typical mistakes made too. 

Got to solve this first then think about documenting something. The Vespatronic manufacturer should do it. Its a great system but for such an expensive product, the instructions are shocking.

Back in the garage this weekend!

At least the Racer looks great and runs really nice.

[jbcollier]

People have a lot of trouble with electrical. What they want is simple instructions to hook this wire to that wire and they're done. They want plug and play. There are just too many variables in stock spec, repairs made, etc for this to happen. Ideally you would carefully survey the scoot before ordering.

[tzsteve]

I went 12dc and made a loom These stator have very little power for the lights at low rpm

[cds]

Problem solved. It was actually a couple of things. First, the loom i bought may have not been right. Colours not matching anything especially with Vespatronic.
I had a green wire from the loom coming out at the junction box so of course according to the wiring diagram, I connected this to the yellow stator wire. After a lot of testing and eliminating i realised that this green wire did not go to the switch but to another (spare wire) hidden inside the loom outer cover. Probably for another scooter. So, i ran my pwn green wire from the junc box to the switch which then gave me power at the switch. Solved? not quite.

Power at the switch but still no lights. after testing I condemned the switch even though new. I bought an identical replacement from Beedspeed and hey presto, lights and horn working.
I kept my 6v horn but it sounded like a strangled duck so just got a new 12v. Its louder but not deafening. It will do fine. Fitted halogen headlight and led festoons at the rear and it all looks great.

Thanks for all the help/advise. I've learned a lot about wiring and vespatronic set up including timing so if I see anyone else struggling, I can chip in with confidence on how to set up.

MOT no and out on the road hopefully soon.

Charlie