World Superbike Racer
Join Date: Jul 2005
Location: Troy or East Lansing, MI
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Speedometer not working
Ok so here's what i got...
Tuesday of last week, speedo stopped working, first could reset by turning off ignition and would work for a little bit, then quit all together. Was in lansing, so on friday I rode the bike back to my parents house to work on it..
Speedometer started working about 20 miles from home, tore bike apart last night anyway to check wiring, everything seemed fine, so went out for a ride late last night and it quit about 2 miles from parents house.
This morning here is what i have...
+12v power from battery to speedometer (checked at bottom side of vss (vehicle speed sensor) connector (black = +12v, green = ground, pink = signal)
I have a constant +5v signal from the pink wire to ground(back side of the vss connector) and i have continuity all the way up to the dash in the pink wire, so I know it's all connected.
There is no short to ground from pink wire to green, and the signal voltage (+5v) never drops to zero like it's supposed to. SO i think I need a new sensor.
Question: Does the gauge cluster emit the +5v which is then pulled to ground at the sensor (what i have is steady +5v) or should the constant voltage be 0v and then a 5v pulse is generated by the sensor??? (Me thinks not?)
Also, if I rotate tire I do not get a +5v pulse to 0v like i did last night, it's just a constant +5v....
so what i'm thinking is I need a new sensor, which is about 60 bucks from ron ayers... anyone with any advice is welcome...