mc-13-150 brake switches By hooknose (Read 999 times)

[hooknose]

Are the brake switches the same on the left and right side of a 2008 Roketa Bali mc-13-150. The replacement I ordered (for the left) has a plastic nipple as apposed to the brass original. Just wondering if there are some grounding issues since this side enables the electric start. Any comments would be appreciated.

[Alleyoop]

There are usually A LEFT and A RIGHT brake switch and its basically for the mounting of it.
Alleyoop

[hooknose]

I will rephrase my Question. Are the left and right side switches identical ? If not what is the difference in material and function since only the left side enables my electric start?

[Alleyoop]

They are identical they BOTH should enable the Solenoid as well as the Brake lights.

It is always the LEFT handbrake people squeeze because they are on the LEFT side when they start the scoot and get on. But when someone comes on and says nothing happens when I squeeze the Left hand brake we tell them to try the RIGHT handbrake to see if that one works. It is unusal for BOTH switchs to go out at the same time but if both do not work then the first thing to check is if voltage is getting to the switchs.
Alleyoop

[hooknose]

I got this bike used with only 69 mile on it and only the left side would enable the starter then .Yes, I did try using both levers to enable the starter and only the left one did. Since the miles were so low, and the right side engaged the brake lights still, I assumed that this was normal . Apparently that was the wrong assumption (not the first one I've ever made). So apparently the right switch was out when I got the bike or the switch wiring is loose somewhere . The left switch went out recently and yes, power to the switch was my first check. I shorted the two wires out and it did enable the starter. So looks like my next move is replace both switches. And to recap; there is no functional difference between the ones with the plastic nipples and the ones with the brass ( thought maybe the brass ones were grounded and the plastic ones not)?

Thanks for all the input: hooknose

[Bashan]

The switches are identical, some have brass buttons instead if plastic to be more durable, grounding is not an issue.

The brake light circuit is what is supposed to supply juice for the solenoid via the start button. So it shouldn't matter which brake handle you pull in. Somebody rewired it so that the start button works off of the left handle somehow. Rich

[hooknose]

Thanks for the clarification on the switches Rich. I will replace the one on the left and leave the right one alone.

Jess

[jaksonbrown]

That's impossible. Both brake light switches feed the brake lights and stater relay through the yellow/green wire going to them.

The start button is not connected to this side of the circuit rather when pushed supplies ground to the starter relay/solenoid alone.

Since the brakes feed off of the yellow/green wire from either brake switch and the starter relay is attached to this wire if the left brake starts the scooter so will the right and if the brakes are working with the right one pressed it again feeds down to both bulbs on this scooter which again the starter relay is connected.

I would check the brake light again on the right side. Know this cooter well especially the wiring, own one.

[hooknose]

jaksonbrown; thank you for the description of how the brake light, starter, and solenoid are wired. Since removing the left switch I checked the right brake handle and it does not engage the brake lights. Is it possible that the right switch has been out the whole time and the left one has been shorted out causing the lights to be on whenever I turn the key on? I don't remember trying to start it without depressing the handle. I don't really know if this theory is valid but when I took the left switch out the button was stuck in the depressed position. I ordered three of the switches because I heard they were problematic , so I will replace both and hopefully she will start as was designed.

[Alleyoop]

Yes, if it was stuck on the depressed position your brakes lights would be on all the time as soon as you turned the key on. And you would not have needed to squeeze the brake, just had to push the start button to ground the circuit to energize the solenoid.

New switchs will make it work like it was designed.
Alleyoop

[hooknose]

After taking more plastic off to get too the switch wiring connectors this is what I found. Yellow and green wire from left going to G&Y 2into 1 connector, Black from left switch going to B 2into 1 connector. Coming from the right switch G&Y going to same black connector as left switch black wire.Black wire from right switch taped off unconnected. I first replaced the faulty left switch and tested for brake lights and start; it worked as designed. Next I untaped the right black wire and connected to the open G&Y connector that also connects left switch G&Y wire. The brake lights came on without me touching the lever. I unhooked the switch from the handle to see if it was stuck on (after jiggling did not work). Switch was fine. After making sure the lever was releasing to full off position I took the left lever and right off for comparison.The lever on the faulty right side was between 1/16 & 1/8 inch shorter in the area that makes contact. I put a small dab of epoxy putty on it to lengthen the contact point, let harden, then hooked the black wire into the open G&Y connector. It now seems to work as designed on both sides. But before I put the plastic back on I have one question on the wiring. I looked at your posted Bali wiring diagram and it looks like the left and right switch wires both connect black to black & green yellow to green yellow. Just wondering if the wires from both switches both connect to same color connectors.

[jaksonbrown]

Switch wires on the pigtails to them colors vary, doesn't matter which one you hook up to what, it's a simple on/off switch. You are correct black to black and yellow/green to yellow/green and both do the same job turn the brake lights on and send 12 volts to the starter relay.

When you press the start button you complete the starter relay circuit by supplying the ground side to it.

[hooknose]

I figured that out after my last posting. Since the switch just closes or opens the circuit, either way you put the wires the current will travel the same direction. Got it back together and engaging the starter from both brake levers now (just in time to put away for the rainy season here in WA state). Thanks for all of the insight to everyone who replied to my quandary.

Jess

[Alleyoop]

Nice Going, now you can start it from either Brake.
Alleyoop