Suzuki gs 650 low volts on coils when running..

[Guest]

Hi is there any suggestion where to look problem..When the ignion is on there is 12v on coils but when bike is running it drops and is about 4v seems like there is something broken.

[Steve]

Are you measuring voltage on the correct wire?

You should be measuring on the orange/white wire.

The other wire will actually be pulsing as the circuit is interrupted to generate the spark, and the average will read less than battery voltage.

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[P.V_FINLAND]

Between these two.....

[JTGS850GL]

The voltage needs to be measured between the power supply line feeding the coil (orange/white wire as Steve noted) and a solid ground. The other two wires going to the coils are pulsed by the Ignitor. Measuring directly across the coil gives you a false reading with the engine running.

Just follow the O/W wire to the correct tab on the coil and probe there. The other lead from the DVM should go to ground. When you start the engine the voltage reading may drop a small amount that corresponds to line losses and any inline higher resistance connections as current rises in the circuit. It should not drop by several volts though. If so, then trace down where the voltage drop is occurring.

All inline connectors (there are several) and the kill switch would be suspect. Probe across the input and output side of each connector and verify the voltage drop across the connection. There should be near zero volts from input to output. If you come across any connection that has any significant voltage drop then clean or replace that connection. Just be aware that by probing the connection you may in fact cause the connection to improve or degrade as you press on it, so probe lightly. You may be able to trace connection issues down by measuring voltage at the terminal point and wiggle the connections from fuse box to coil and see if the voltage varies. If so, then you've found a bad connection. If the kill switch (when in on position) shows a voltage drop, then I'd replace the switch. Don't forget the fuse connection and the fuse itself.

[tkent02]

If the kill switch (when in on position) shows a voltage drop, then I'd replace the switch.

A problem in the kill switch is often caused by dead spiders, cobwebs, and corrosion. Take it apart and clean it out, it's easy.

[tom203]

It's pointless to measure there (in pic), besides you did say bike was "running" -this is good! be happy

[Chris G]

A problem in the kill switch is often caused by dead spiders, cobwebs, and corrosion. Take it apart and clean it out, it's easy.

Did this while doing something non related, as stated mine was turning into a bit of a green mess in there, while your at it clean the rest up, my stater button and light sw were also looking sorry for themselves.

[posplayr]

The ingenuity in developing new (never before heard of ) tests is mind boggling.

Someone needs to start a top 10 Newbbie "How NOT to test electrical systems".

I nominate this thread as one of the top ones.

[JTGS850GL]

Just trying to keep everyone entertained.

[tkent02]

The ingenuity in developing new (never before heard of ) tests is mind boggling.

Someone needs to start a top 10 Newbbie "How NOT to test electrical systems".

I nominate this thread as one of the top ones.

I think a Kindergarten level electricity book would be well worth writing.

I think a lot of folks never even got the preschool level book. You know, how do flashlights work and stuff like that.

[Steve]

You know, how do flashlights work and stuff like that.

Everybody knows that a "flashlight" is just the term for a tube that stores dead batteries.

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[JTGS850GL]

There's an old concept call the dark sucker theory. It states that that light is the void of dark suckers.

For years, it has been believed that electric bulbs emit light, but recent information has proved otherwise. Electric bulbs don't emit light; they suck dark. Thus, we call these bulbs Dark Suckers.

The Dark Sucker Theory and the existence of dark suckers prove that dark has mass, is heavier than light, and is faster than light.

First, the basis of the Dark Sucker Theory is that electric bulbs suck dark. For example, take the Dark Sucker in the room you are in. There is much less dark right next to it than there is elsewhere. The larger the Dark Sucker, the greater its capacity to suck dark. Dark Suckers in the parking lot have a much greater capacity to suck dark than the ones in your room.

As it is with all things, Dark Suckers don't last forever. Once they are full of dark, they can no longer suck. This is proven by the dark spot on a full Dark Sucker. A candle is a primitive Dark Sucker. A new candle has a white wick. You can see that after the first use, the wick turns black, representing all the dark that has been sucked into it. If you put a pencil next to the wick of an operating candle, it will turn black. This is because it got in the way of the dark flowing into the candle. One of the disadvantages of these primitive Dark Suckers is their limited range.

There are also portable Dark Suckers. In these, the bulbs can't handle all the dark by themselves and must be aided by a Dark Storage Unit. When the Dark Storage Unit is full, it must be either emptied or replaced before the portable Dark Sucker can operate again.

Dark has mass. When dark goes into a Dark Sucker, friction from the mass generates heat. Thus, it is not wise to touch an operating Dark Sucker. Candles present a special problem as the mass must travel into a solid wick instead of through clear glass. This generates a great amount of heat and therefore it's not wise to touch an operating candle.

Also, dark is heavier than light. If you were to swim just below the surface of the lake, you would see a lot of light. If you were to slowly swim deeper and deeper, you would notice it getting darker and darker. When you get really deep, you would be in total darkness. This is because the heavier dark sinks to the bottom of the lake and the lighter light floats at the top. That is why it is called light.

Finally, we must prove that dark is faster than light. If you were to stand in a lit room in front of a closed, dark closet, and slowly opened the closet door, you would see the light slowly enter the closet. But since dark is so fast, you would not be able to see the dark leave the closet.

Next time you see an electric bulb, remember that it is really a Dark Sucker.

[Steve]

Thanks, JT.

That is going into my humor file, right next to How Carburetors Work.

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