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Recently my Honda GL1200 started to exhibit a peculiar problem:
- When riding, the speedometer on the digital instrument panel displays numbers that jump erratically rather than smoothly, never reporting accurately the correct speed.
- While in neutral with the bike stationary, after about 15-20 seconds, if I quickly rev the engine, it will show erratically show some digits on the speedometer.
http://spaznet.gotdns.com/media/gl1200_speedometer.avi (a video of the problem in action)
- After I've reved the engine, if I let it sit and idle, the speedometer may do some miscellaneous digits.
- If I disconnect the speed sensor, at the wiring connector, the speedometer only shows '0' (which one would assume it should since there is no speed sensor connected)
I followed the manual's directions to test the speed sensor (connect a multimeter's probes to the blk/br and bls/y wires while the speed sensor wiring is still connected, the key is at the on position, and turn the speed sensor clockwise slowly, getting a reading that goes from 0 then to 5 volts approx 8 times). When I did this, my speed sensor fluctuated from .15v to 2.0~2.1 volts, about 8 times. I separated the wiring connection, turned the key to the on position and read the voltages from the speed sensor's connector harness (multimeter's black probe to ground and red probe to each of the 3 connectors)
blk/br wire : 10 volts
blk/y wire: 4.5 volts
blk/grn wire: 0 volts
So, is the speed sensor bad? or maybe I have a short that is somehow causing the speedometer to get false reading? Any ideas would be great as I'd hate to sink the money into a new sensor, only to find out that it's something else!
Recently my Honda GL1200 started to exhibit a peculiar problem:
- When riding, the speedometer on the digital instrument panel displays numbers that jump erratically rather than smoothly, never reporting accurately the correct speed.
- While in neutral with the bike stationary, after about 15-20 seconds, if I quickly rev the engine, it will show erratically show some digits on the speedometer.
http://spaznet.gotdns.com/media/gl1200_speedometer.avi (a video of the problem in action)
- After I've reved the engine, if I let it sit and idle, the speedometer may do some miscellaneous digits.
- If I disconnect the speed sensor, at the wiring connector, the speedometer only shows '0' (which one would assume it should since there is no speed sensor connected)
I followed the manual's directions to test the speed sensor (connect a multimeter's probes to the blk/br and bls/y wires while the speed sensor wiring is still connected, the key is at the on position, and turn the speed sensor clockwise slowly, getting a reading that goes from 0 then to 5 volts approx 8 times). When I did this, my speed sensor fluctuated from .15v to 2.0~2.1 volts, about 8 times. I separated the wiring connection, turned the key to the on position and read the voltages from the speed sensor's connector harness (multimeter's black probe to ground and red probe to each of the 3 connectors)
blk/br wire : 10 volts
blk/y wire: 4.5 volts
blk/grn wire: 0 volts
So, is the speed sensor bad? or maybe I have a short that is somehow causing the speedometer to get false reading? Any ideas would be great as I'd hate to sink the money into a new sensor, only to find out that it's something else!