george0fthejungle Posted August 3, 2008 Share #1 Posted August 3, 2008 Hi everyone, I just picked up my first gen Venture from my mechanic yesterday and we are both at a loss over the brake fluid warning light. The bike was in for a rear master cylinder rebuild. The rebuild went fine with Yamaha orig parts, fluid was topped off, system "burped" or bled to make sure no air in the lines....and the sensor and warning light remain on. Front brakes also checked, good fluid levels, no air in lines.....sensor and warning light remain on. Took the bike for a test ride, brakes are great, responsive, no squishiness in rear pedal or front brake handle. So now Im wondering....is there a reset that has to be done after the maintenance has been performed? Paul george0fthejungle Firstgen VR Gold Link to comment Share on other sites More sharing options...
IH Truck Guy Posted August 3, 2008 Share #2 Posted August 3, 2008 Hi everyone, I just picked up my first gen Venture from my mechanic yesterday and we are both at a loss over the brake fluid warning light. The bike was in for a rear master cylinder rebuild. The rebuild went fine with Yamaha orig parts, fluid was topped off, system "burped" or bled to make sure no air in the lines....and the sensor and warning light remain on. Front brakes also checked, good fluid levels, no air in lines.....sensor and warning light remain on. Took the bike for a test ride, brakes are great, responsive, no squishiness in rear pedal or front brake handle. So now Im wondering....is there a reset that has to be done after the maintenance has been performed? Paul george0fthejungle Firstgen VR Gold Not that I'm aware of.When I did my brakes,new pads and topped off brake fluid,warning light went out...... Link to comment Share on other sites More sharing options...
Rocket Posted August 3, 2008 Share #3 Posted August 3, 2008 So now Im wondering....is there a reset that has to be done after the maintenance has been performed? Paul george0fthejungle Firstgen VR Gold Nope, no reset at all. 3 things come to mind & remember there are sensors for both front, rear masters..... Unplugged sensor connector Dirty contacts at connector Damaged wires for sensor You can use a jumper wire, to bypass the sensor at the connectors, in order to determine which one is causing the warning. Start with the rear one, as it is along the frame, under the side cover & easy to get at. Unplug sensor wires from wiring harness, insert jumper, turn ignition on & see if the indicator goes out on the CMS unit. If needed do the same for the other sensor. Link to comment Share on other sites More sharing options...
Neil86 Posted August 3, 2008 Share #4 Posted August 3, 2008 Actually there is only sensors on the front and rear brake masters, not the clutch. You can test as Rocket has posted. It may be the float is sticking on the rear master...it slides on a post so might have some deposit buildup. Push the float down with a blunt object to see it it moves back up freely. Link to comment Share on other sites More sharing options...
Saddle_Bag Posted August 3, 2008 Share #5 Posted August 3, 2008 Did they open the reservoir?? Mine hung up because the diaphram was stuffed in it and holding the sensor in place activating the brake light. This was the beginning of one major headache.............. Good Luck with it. joe Link to comment Share on other sites More sharing options...
Condor Posted August 4, 2008 Share #6 Posted August 4, 2008 Did they open the reservoir?? Mine hung up because the diaphram was stuffed in it and holding the sensor in place activating the brake light. This was the beginning of one major headache.............. Good Luck with it. joe That'd be my guess too.... I had the same problem. Solved it by taking a small wire hook and lifted on the diaphragm. Don't know if I got it completely folded back up, but moved it enough that the sensor started...er.. maybe stoped... working.... Link to comment Share on other sites More sharing options...
Macdogg Posted August 4, 2008 Share #7 Posted August 4, 2008 When I replace my rear master had the light come on......took a bit to figure out that it was brake and not water level. That being said I topped off the resivoir (sp) and the light went out and hasn't come back on for the past 4k miles. Hope you fix is as easy as mine was. Link to comment Share on other sites More sharing options...
george0fthejungle Posted August 5, 2008 Author Share #8 Posted August 5, 2008 After a couple of you suggested the sensor hadnt been reconnected I dug out my service manual and looked it up. I described the connector to my mechanic and I could hear the circuit breaker click in his head over the phone. He forgot to reconnect it. I could pop off the panel and reconnect it myself.....but hey, when I pay for work, I pay for it to be done right so Im going to swing by and let him. Besides...I think he disconnected my airl leveling system too. The back was already disconnected because the previous owner towed a trailor, but now nothing shows on the leveling systems display but the psi symbol and it wont activate in manual or auto mode. I downloaded the pdf of the service manual that someone here was good enough to post on the site. Im going to give him a copy. Thanks everyone for your input and suggestions. Paul Link to comment Share on other sites More sharing options...
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