Wiring ProblemsĮlectrical wiring on bicycles is often subjected to serious abuse, and it is very common to have breaks in the wiring, particularly if the wire is not properly routed and secured. A misaligned magnet can also result in odd or doubled readings - see the article on that topic. These are easy to align, but they also may rotate around a spoke, so the sensor does not respond. This trick is particularly useful when you have more than one set of wheels with different spoke patterns so you can't duplicate the magnet placement. I have sometimes used small button magnets from Radio Shack secured to the spokes with transparent tape. The magnet should preferably be mounted close to the hub, so it travels past the sensor at a low speed, giving the sensor more time to respond. Sometimes, substitution of a more powerful magnet can make the difference in getting a computer to work. The more powerful the magnet, the less fussy its alignment with the sensor. Some magnets are more powerful than others. Also try sliding the sensor or magnet, one or the other, closer to the hub, or farther away. The sensor will not respond if too far from the magnet. Some other units have a special procedure to "re-boot" the processor, usually by pushing all of the buttons at once.īy and large, wheel magnets used in cyclecomputers are very ordinary, and may be interchanged from one brand to another. Genuine Cateye batteries, which are no longer available, came with a special little piece of thin plastic that can be inserted between the two batteries and then yanked out to establish contact cleanly. Many Cateye Solars have been discarded as defective, when they only need to have the batteries re-installed correctly. This is a particularly common problem with the Cateye Solar, which has very tight spring contacts and uses two small batteries that are a bit hard to install.
The unit may show all 8's, or random fragments of characters, or may come up blank. This can cause "garbage" readings to appear. If the battery makes contact on a "bouncy" way, the irregularities of contact as the battery is pushed in can send confusing messages to the circuit. Ideally, the battery should make instantaneous, solid contact with its terminals, but in some cases, this is not so easy to do. Some units are a bit fussy about how cleanly power is restored. When the battery is replaced, power is restored to the computer.
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