battery light question

[Burninator]

When I took my 86 VR to the shop for some work I told the mechanic that the battery light would be on because I installed a new battery and that I would fix it when I got it back home. When I picked up the bike the mechanic had wired the battery sensor to the positive battery post. Needless to say the battery light was off. I told him that could damage the electronics and he disconnected the sensor from the battery. Everything seems to work correctly. How can I tell if the chip has been damaged. Will the light stay on or will other things quit working?

[MasterGuns]

Well, this is a surprising post as I have been informed by several other members that if the battery sensor lead is connected directly to 12 Volt, it will surely burn out the IC chip that controls the Battery Warning Light on the CMS display. But after what you just described the mechanic did, I don't believe what I have been informed is accurate. Are you sure the lead was connected directly to the battery? Before I spend more $ buying another replacement CMS (on Ebay of course; not from the dealer for 800.00 smackers), please tell me this isn't true.

 

If you disconnected the battery sensor lead from the + post of the battery, a reconnected it using the factory sensor probe AND your battery light does not come on, I would have to say all is good. However, I would also disconnect the sensor lead where it plugs it at the male/female connector and if the Battery Warning Light then comes on, that would be proof to me nothing got burned out and the battery warning system is still functional.

Edited May 11, 2009 by MasterGuns

[GeorgeS]

Pull sensor out of old battery.

 

Cut off sensor,

 

Solder a 2200 Ohm resistor to end of wire.

 

Connect a length of hook up wire to other end of resistor ( and solder )

 

Cover new resistor with Insulated shrink tubeing.

 

connect end of new piece of wire to a Switched 12 V source.

 

 

OK, that is the mod, as how its been done on many of our bikes.

 

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Thats basicly it. You now have a lower voltage going to the CMS.

 

As far as the mechanic at the dealer knowing anything about Electricity, or computer chips, Forget it !!

[jasonm.]

another reason why I hate taking my vehicles to anyone for service...they don't listen!