charge warning light coming on at low RPM

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steved001
Posts: 13
Joined: Sun Apr 05, 2020 8:10 pm
model: 907 I.E.
year: 1992
Location: USA

charge warning light coming on at low RPM

Post by steved001 »

92 907ie. No doubt a simple question/answer for this esteemed group, is this an indication of a failing voltage regulator?
steved001
Posts: 13
Joined: Sun Apr 05, 2020 8:10 pm
model: 907 I.E.
year: 1992
Location: USA

Re: charge warning light coming on at low RPM

Post by steved001 »

Sometimes flickers, sometimes illuminated continuously.
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higgy
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Re: charge warning light coming on at low RPM

Post by higgy »

it is certainly an indication that you need to look into charging
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steved001
Posts: 13
Joined: Sun Apr 05, 2020 8:10 pm
model: 907 I.E.
year: 1992
Location: USA

Re: charge warning light coming on at low RPM

Post by steved001 »

Yup, thanks, I suspected that, just wondering if anyone else has faced the low rpm charge light specifically and if that meant this was indicative of a failing regulator, or problem with the rotor/stator or some other part of the charging system (I'm a former outboard mechanic, and the systems are similar, but in those days few OBs had a charge light).
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Re: charge warning light coming on at low RPM

Post by Mc tool »

Get stuck in with a multi meter , you maybe lucky enough to find a bad earth or connection .
I wish I was young again............Id be heaps smarter than last time
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higgy
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Re: charge warning light coming on at low RPM

Post by higgy »

lots of info here on charging systems

Search found 158 matches: 907ie charging system
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
Electrocuted Birds Are Bursting Into Flames and Starting Wildfires :roll:
88 750
90 906
92 907ie
steved001
Posts: 13
Joined: Sun Apr 05, 2020 8:10 pm
model: 907 I.E.
year: 1992
Location: USA

Re: charge warning light coming on at low RPM

Post by steved001 »

OK, thanks, plan on poking around with a DMM today.
steved001
Posts: 13
Joined: Sun Apr 05, 2020 8:10 pm
model: 907 I.E.
year: 1992
Location: USA

Re: charge warning light coming on at low RPM

Post by steved001 »

Checked all voltage regulator connections, all were clean and tight. I get voltage increase with rpm increase, at idle it isn't charging, 12.45. Battery is new. At about 2500, it goes to 13.00. I've ordered a new VR. What should the proper voltage be at about 1000 rpm?
steved001
Posts: 13
Joined: Sun Apr 05, 2020 8:10 pm
model: 907 I.E.
year: 1992
Location: USA

Re: charge warning light coming on at low RPM

Post by steved001 »

Completed voltage regulator replacement, required some wiring modifications, I had to make an adapter to go from male bullet to male bullet. Voltage is now back to normal.
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