AeroPod, PowerPod and Newton

I've got a wired speed/cadence mount which has been working fine for years. About 10 mi into a ride yesterday, it started getting flaky - speed and power going up and down, then dropping out intermittently, then finally dropping out altogether. No amount of repositioning the magnet, the pickup, wiggling the unit on the mount, wiggling wires at the pick-up or mount end, etc, will get it to read speed now. Cadence is reading fine. Have tried a brand-new battery, have tried 'resetting' the unit w/ a reversed battery, have tried having it scan for wireless (it sometimes seems to go into wireless mode and won't read the wired mount until I tell it to scan for wireless and it fails) and have tried changing profiles w/in the unit. I can connect via the USB adapter and read from the device w/o problems. Oh, also, I can hear the wheel pick-up making its little tink-tink-tink noise when the wheel magnet passes by it, so it seems that part is good. The wire appears intact the whole way between the pick-up and unit mount, and the bike hasn't suffered any kind of trauma (such as might damage the pickup, wire or mount.)

I'm guessing something has gone wrong w/ the pick-up or the mount or somewhere in between, and a good first step would be to check the pick-up/wire - I presume by using a continuity meter and spinning the wheel, but I'm not sure which pins to connect to the meter. Can someone point me in the right direction on that, and/or give me any alternate suggestions for diagnosing or getting past this problem? I'm completely dead in the water at present.

Thanks!

Well, even w/ the pick-up taped to the magnet, no combination of any 2 pins on the mount would give me a continuous loop w/ the meter, so I took a leap of faith and lopped off the iBike wheel pick-up and spliced on an old Sigma Sport pick-up, and sure enough, the iBike is reading the wheel speed again. So, it would appear that the pick-up went bad. (A close inspection of the pick-up showed a crack on the concave bottom side of the molded pick-up unit - I suspect from several years of it being zip-tied to my essentially flat inner fork leg (its a wide, blade-style fork, so the inner surface is flat, while the pick-up is concave, so likely underwent distortion over time being zip-tied to a flat surface).

I'm wondering if this might help w/ some of the rain-related problems I've had at times, too - sometimes in the rain, or even just on really wet roads after a rain, the iBike will stop measuring wheel speed - maybe water was working its way into the pick-up through the crack.

Given the seeming prevalence of wider fork legs these days, it might be worth iBike looking at modifying the pick-up design at some point to get rid of the concave back, or maybe provide a little extra hunk of plastic that would fit into and fill the concave for use w/the flatter fork legs, if others have experienced similar problems. (Or, maybe they need to put out an update to the manual instructing those of us who are zip-tie-happy to go easy on the zip-tie tension when attaching the sensor to a flat fork leg...

of course now I've got to find a big-honkin O-ring that will wrap around my bladed fork leg for the Sigma pick-up...