Hydraulic Brake Switch not working

Hi all,

I've fitted rearsets to the GSXR and a brake light switch. Trouble is it won't work! I've tried two switches for I'm fairly confident the problem lies with me. I've bled the system and the pedal is firm, no more air coming through the nipple.

Where I soldered the switch into the existing wiring I've shorted across it and brake light is fine so it's definately from that point down.

I've fitted braided lines a few times before and never had any problems bleeding brakes so I don't think it's wholly me? Bike is an 08 GSXR 600 so I doubt there's much wrong with the brake system either.

Any ideas?

[yorkie_chris]

Try the switch wires the other way around?

Originally Posted by yorkie_chris

Try the switch wires the other way around?

Possibly although I don't think it matters does it? Would it be worth cable tieing the brake pedal down just in case there is air in the system or doesn't it work in the same way as the front brake?

[fastdruid]

Originally Posted by yorkie_chris

Try the switch wires the other way around?

I'm pretty sure it makes no difference.

You could just have a dud switch

Druid

Originally Posted by fastdruid

I'm pretty sure it makes no difference.

You could just have a dud switch

Druid

I thought that so I had another delivered and it's the same...hmmmmm.

[yorkie_chris]

Originally Posted by andyb

Possibly although I don't think it matters does it? Would it be worth cable tieing the brake pedal down just in case there is air in the system or doesn't it work in the same way as the front brake?

If it's getting pressure it should activate the switch.

Regarding the wires, dunno. Might affect it, depends on how the switch works, I tihnk it is some semiconductor rather than a simple plunger and contact arrangement.

[fastdruid]

Is there maybe a 'bubble' of air just in the banjo stopping it from working?

Druid

^ to get rid of that, take the bike out for a spin and use the rear brake as much as possible, should clear the air (rumble speed bumps are good for this as well )

then re-bleed the system had no problems what so ever with my rear brake banjo

[rictus01]

Originally Posted by barwel1992

^ to get rid of that, take the bike out for a spin and use the rear brake as much as possible, should clear the air (rumble speed bumps are good for this as well )

then re-bleed the system had no problems what so ever with my rear brake banjo

Hmmmm, a braking system with a known issue, go out and find some bumpy roads...... remind me not to use that golden nugget of information.

On a more practical note, unbolt the caliper from the carrier and hold it above the rest and bleed it, pressure switches are none user serviceable so you can't really do anything with them however you can test them on the front circuit by replacing a normal banjo and meter the switch, generally it makes no difference which way the wirers go as it's a simple connected circuit.

Cheers Mark.

if the brake works then i dont see the problem, as he says the leaver is hard if there is a small amount of air stuck in the banjo then its not going to have a huge affect on braking power ..... and its not like hes riding it around with out functioning front brakes (i hope)