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Tach fritzing

Old 04-13-2015, 08:38 AM
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Tach fritzing

So this is a strange cause and effect. I installed a brand new battery and in the next few days my tach has begun to not work intermittently. Then my digital thermometer.

These could be unrelated but could a slightly larger battery (YTX 14BS) do this? Seems unlikely or unrelated but has anyone had this happen before I start tracing wires?

Seems too coincidental to be a coincidence.
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Old 04-13-2015, 09:00 AM
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How's your R/R?
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Old 04-13-2015, 09:27 AM
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R/R is recently replaced and I have 2 voltage meters that are reading good charge rates. I will double check its connections now that you mention it and put an outside voltmeter to check.
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Old 04-13-2015, 10:01 AM
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Update: Voltage is 13.2 standing and 15.7-15.8 running measured across battery.

That sounds too high to me.

UPDATE 2 I swapped on my backup RR (also an R1 unit) and the running voltage went to 16.5-16.6.

BUT, the tach came back on so at least I can (sorta) rule out bad connnections.

The different volts could easily be due to me sanding the contacts when re-installing the ground.

Last edited by smokinjoe73; 04-13-2015 at 10:22 AM.
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Old 04-13-2015, 04:02 PM
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Well, this is a one sided post but the latest finding is that all is normal with the new RR.

One more proof that it pays to keep a regulator rectifier in stock just in case.
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Old 04-13-2015, 04:53 PM
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Glad to help out. lol
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Old 04-13-2015, 04:59 PM
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Yeah, kind of like when I ask my wife where my glasses are when they are on my head.

I still think its just the clean ground wire that did it. Still want to do that free ground upgrade mod.

Last edited by smokinjoe73; 04-13-2015 at 05:32 PM.
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Old 04-13-2015, 05:48 PM
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Originally Posted by smokinjoe73 View Post
Update: Voltage is 13.2 standing and 15.7-15.8 running measured across battery.

That sounds too high to me.

UPDATE 2 I swapped on my backup RR (also an R1 unit) and the running voltage went to 16.5-16.6.

BUT, the tach came back on so at least I can (sorta) rule out bad connnections.

The different volts could easily be due to me sanding the contacts when re-installing the ground.
Soooo, you're leaving it as is @ 16+?

See post 133.

Last edited by Wolverine; 04-13-2015 at 05:54 PM.
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Old 04-13-2015, 07:50 PM
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Well, sorta. That reading is with an actual multimeter.

I have 2 other voltmeters on the bike and they are reading around 14's. I am going to do some tinkering tomorrow to get a better sense.

I don't love the idea of a true 16volts, but don't think it is. Will try other meters I have.
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Old 04-15-2015, 07:29 PM
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Originally Posted by smokinjoe73 View Post
Well, sorta. That reading is with an actual multimeter.

I have 2 other voltmeters on the bike and they are reading around 14's. I am going to do some tinkering tomorrow to get a better sense.

I don't love the idea of a true 16volts, but don't think it is. Will try other meters I have.
Try a quality known good meter (tested against a known source voltage.)
16+ volts is in the destroy 12VDC components range

You either have a bad R/R if you really are getting 16v DC, OR you have a bad meter

Last edited by E.Marquez; 04-17-2015 at 05:06 AM.
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