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Really odd cyclecomputer behavior

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Really odd cyclecomputer behavior

Old 06-11-07, 06:25 AM
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Kotts
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Really odd cyclecomputer behavior

I have a Nashbar "Dual" cycle computer (two sets of records for two different wheel sizes). Pretty basic wired unit. Recently it began behaving oddly. It works great up to about 23 MPH then the display goes blank and it stops recording (I can tell because it's missing about 3/4 of a mile from my dialy commute).

The problem started after a commute home in a heavy rain, followed by wheel removal and replacement in the cleanup process. The sensor/magnet alignment seems fine, and things appear to be fully dried out.

Any ideas I should check out?

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Old 06-11-07, 07:53 AM
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Check the wires for any faults or fraying - It may be a short circuit if the wire has been stripped in one place. Test different sensor and magnet positions.

Most likely fix though - replace the battery.
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Old 06-29-07, 06:24 AM
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Originally Posted by C_LOGAN
Check the wires for any faults or fraying - It may be a short circuit if the wire has been stripped in one place. Test different sensor and magnet positions.

Most likely fix though - replace the battery.
Well, it flaked out again, with a fresh battery. On my commute in this morning, it would be fine up to about 16 MPH, then as I went faster the indicated speed would start dropping, until it was at 0 at (I'm guessing) about 18 MPH.

I might be wrong on the exact number, but I know I was going faster than 0!

I checked it by intermittently shorting the terminals on the head unit by flicking a paperclip back and forth over them them, and I can get it up to 37 MPH that way, so it isn't the head unit.

Time to start checking wiring and sensor.
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Old 06-29-07, 10:03 AM
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Originally Posted by Kotts
The problem started after a commute home in a heavy rain, Any ideas I should check out?
It is possible that it got water inside, and basically ruined the thing.
I've had it happen, I "dried" mine too.
Don't waste too much time, buy a new one.
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