Battery light warning light ''on''

[Guest]

hi all.. my bike (84 gs 1150) has an aftermarket battery, and looks like what i think is the battery sensor wire, (the one near battery with the plastic peg fitting) is not connected to battery in any way, because there is no place to fit it with the non-stock battery,,,, so would this make the warning light illuminate. Battery is fully charged and showing 26volts. Im not sure if the charging system is working cause ive only just got it. im not sure how to check. any help??

[cowboyup3371]

Can you please clarify that voltage reading as I'm not sure how a 12v battery would read 26v?

[Steve]

After we determine what is wrong with your battery to make it show 24 volts , we can tell you how the light works and how to eliminate it.

First, the sensor is just a probe that goes into one of the middle cells of the battery. When that (one) cell gets low on electrolyte, contact with the probe is broken and the light comes on. The fix is to add fluid to the battery.

There are two ways to turn the light off:
1. Install a battery with a port for the sensor. Keep in mind that it will be an old-school wet-cell lead-acid battery, and you will be constantly maintaining it.
2. Keep whatever battery you have or install a good AGM (that is a construction type, not a brand name) battery in there, then connect the sensor wire to one of the switched terminals in the fuse box.

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