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Wiring TC Bros Ignition Switch
- Thread starter dougmuise
- Start date
On the TC bro's switch, is it like a car switch where you turn it to the third position, then it snaps back to the second position?
If so you hook the red wire to the old switch to the B terminal.
The G may be an IG instead. This wire powers everything else on the bike.
The ST sends power to the starter relay. You will find a blue/white wire in the headlight bucket that went to the starter relay. Run this to the ST terminal on the new switch. Now at the starter relay unplug the red/white wire and run a wire from the r/w wire of the relay to ground.
I didn't think Yamaha used any 4 wire switches on the XS650. Most use a 3 wire switch. A red wire is main power. A brown out to power most everything on the bike. A third wire is blue or blue/yellow, depends on the year. 79 had a blue/yellow. This ran back to the tail light. The tail light ran straight off the main switch. Separate from the headlight controls.
Leo
If so you hook the red wire to the old switch to the B terminal.
The G may be an IG instead. This wire powers everything else on the bike.
The ST sends power to the starter relay. You will find a blue/white wire in the headlight bucket that went to the starter relay. Run this to the ST terminal on the new switch. Now at the starter relay unplug the red/white wire and run a wire from the r/w wire of the relay to ground.
I didn't think Yamaha used any 4 wire switches on the XS650. Most use a 3 wire switch. A red wire is main power. A brown out to power most everything on the bike. A third wire is blue or blue/yellow, depends on the year. 79 had a blue/yellow. This ran back to the tail light. The tail light ran straight off the main switch. Separate from the headlight controls.
Leo
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Most 3 position switches are off. on , acc. Or off, on, on with lights.
I'm not sure on that one. Didn't it come with instructions? If not contact TC Bro's and ask why.
Ask them for a diagram of the switch too.
If you have a multi-meter you can use the ohm scale to check the switch to see where power flows in each of the switch positions.
Hook one meter probe to the B terminal. With switch in the far left position touch the other probe to the ST and G terminals. Move switch to center position, check again, put switch in third position check again. With all these results written down you can see what each terminal gets with each switch position.
Using this info you can determine what each terminal cam power.
Leo
I'm not sure on that one. Didn't it come with instructions? If not contact TC Bro's and ask why.
Ask them for a diagram of the switch too.
If you have a multi-meter you can use the ohm scale to check the switch to see where power flows in each of the switch positions.
Hook one meter probe to the B terminal. With switch in the far left position touch the other probe to the ST and G terminals. Move switch to center position, check again, put switch in third position check again. With all these results written down you can see what each terminal gets with each switch position.
Using this info you can determine what each terminal cam power.
Leo
