I'm just trying to track down an issue with my 2022 V4 Pan and could do with a bit of advice please - Battery charging voltage - does anyone know the value that should be getting into the battery under normal conditions - i.e. no added accessories, engine at idle, measure at the battery terminals Thanks And,, if there is no charge coming into the battery, what are the likely suspects to have failed? reg/rec?
At idle, you should be seeing 13V+ and at 4000rpm you should be seeing 14V+. If you are seeing no charging volts, my first thoughts would be a disconnected or fried wire/connector, followed by a failed regulator/rectifier and worst case, your generator has died. Andy
Thanks Andy.... nothing else is showing issues and the engine does run fine when started Strip down job i guess
Check the AC output from the generator before doing anything as it could be *just* the reg/rec. I don't know the V4 generator-voltage/rpm figures, but I'm sure someone does....
I doubt if the V4 alternator is much different from the other 3-phase Ducati alternators. Measure across any of the 2 yellow wires and expect to read about 14V-18V AC at idle speed, rising by about 15V per 1000 rpm. Checking resistance across any pair of yellow wire will show a very low ohms reading, possibly little more than 1Ω, so difficult to measure accurately. Join your meter leads together with the meter on the lowest ohms setting, usually 200Ω. Note the reading and subtract it from the reading you get when measuring across the yellow wires. You should get about same reading across any pair. You should also check resistance between any yellow wire and ground. The meter should read infinity.
I doubt if the V4 alternator is much different from any other 3-phase Ducati alternator. Measure AC voltage across any two of 3 yellow wires. You should about 15V-18V AC at idle rising by about 15V per 1000rpm. Check across each combination of 2 wires and make sure they show the same volts. Measuring resistance across any pair of yellow wires should show a very low resistance, probably not much more than an ohm so difficult to measure accurately. Also check that there is no resistance path to ground through any of the yellow wires to ground.
