Non-cd-player radio skips/powers off and back on at bumps

Seth Matthews

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I have a stereo that skips in my bike, no cd player, all electronic, when I hit a hard bump it shuts down the radio and powers back up. I've soldered every wire in this thing, I'm certain its not a bad connection. would putting a thick foam strip between the stereo and the housing help this any?
 

brianinpa

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How old is it and how long has it been in there? I had one that the circuit board board was vibrating agains the metal case of the radio. That caused it to short out every time I hit a bump. I never would have seen it or known it without removing the case from the radio and looking at the circuit board.
 

Larry Fine

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One quick check would be to temporarily wire a 12v bulb in parallel with the radio's power and ground leads. The light will flicker when wired after the intermittent point, and it won't when wired ahead of that point.

Don't forget that most units have two power leads: one always-hot that powers the memory and amplifiers, and one switched that turns the unit off when the key is off. Either losing power will turn off the radio.
 

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Most likely a issue with the unit itself. Circuit board level issue. Take it out and knock on the bottom of the unit to try to simulate the issue. Guessing a short is happening due to a cold solder joint. Then again, it can be many things. However, they should not shut off, skip the CD sure, power down not so sure.

Larry's idea to check the power itself with a bulb is sound.
 

Seth Matthews

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I wouldn't doubt what its in the plug going from the outside of my fairing to the inside, thats the only spot that isn't soldered other than the wiring plug in the back of the radio
 

Larry Fine

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I wouldn't guess. I re-suggest temporarily wiring a 12v bulb on a pair of 1-to-2 foot long wires, between one hot wire and the ground wire, and take a bumpy ride. The eye reads flickering incandescent light very well, and is a troubleshooting method I've used for years.

Start at the connections ahead of, and then the connections after, the connector in question. Splice the bulb's wires into one hot and the ground, then the other hot and the ground, If the flicker occurs both before and after the connector, it is not the issue; if only after, it is.

If only one hot wire produces the flicker, you've found the intermittent wire; if both hot wires do, then the ground wire is the culprit. Again, by starting at the main connector, you determine which direction to look, i.e, whether on the bike side or the fairing side of that point.