Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > Supersports: SS / SuperSport / Supersport 950 > battery,rectifrier or genorator???

[monstermob 998]

HELP!!!!! got replacement from ducati but it is different the wires are different colours i have now two yellows two greens and two red/white coming from the unit i guess the two yellows connect to the existing two yellows from generator
the two greens connect to the existing red/white and red/black and the two reds connect into the single red black and not forgetting to bolt on the earth is this right?

[monstermob 998]

well thru trial and error i fitted the new unit
bike starts ok ticks over ok current goes into battry rev the engine to get better reading and the 15 amp fuse blows to fuel pump and ignition indicating a short circuit inspect all wires replace fuse bike starts ok ticks over ok current goes into battry rev the engine to get better reading and the 15 amp fuse blows replace fuse bike starts ok ticks over ok current goes into battry rev the engine to get better reading and the 15 amp fuse blows
then i notice that when fuse replaced ignition on charging light does not illuminate bike starts ok ticks over ok current goes into battry rev the engine to get better reading and the 15 amp fuse blows charging light illuminates
swop back over regulator unit to old one recharge battery switch on, charging light illuminates, goes out when engine running but alas no charge going into battery after several more switches on and off and more multi meter testing more revving of the engine as well as turning into contortionist to hold multi meter points at the strategic points to test as welll as controlling the throttle all this in my fully air conditioned scenic workshop in full view of my well pi**ed off neighbours
in short the thing aint working and ive lost me patience ---see you all later

[Iconic944ss]

total nightmare Dave, almost seems as though you have multiple faults.

I hate electrics too.

I wonder if you have got a later model regulator; not sure what year model yours is - I've just fitted an electrex reg. to mine after the original gave up the ghost.

Blowing 15A fuses sounds major to me and I'd of stopped after the 2nd one blew. Time for some professional help I think - electrical in this case.

There is some thing weird that sticks in my mind for some reason - I used to have a 1979 BMWR100Rs and if the charge system warning light bulb blew, it stopped the charge getting to the battery! I used to carry a spare with me. However, you have see a charge getting to the battery - so this isnt the case.

Good luck mate - take a break from it.

[Shazaam!]

A DC fuel pump trying to overcome a plugged fuel filter or crimped fuel line can easily draw 15 amps - one of the prime causes of regulator failures. The charging system can't put out the 15 amps at idle so it makes sense that the fuse blows when you rev it.

[phil_h]

Originally Posted by Shazaam!

A DC fuel pump trying to overcome a plugged fuel filter or crimped fuel line can easily draw 15 amps - one of the prime causes of regulator failures. The charging system can't put out the 15 amps at idle so it makes sense that the fuse blows when you rev it.

The mans on it again - I'll second that !
I was sitting here earlier thinking that rings a warning bell about something completely different to the things dave was checking.

[monstermob 998]

thanks for the suggestions-- but
i have already eliminated the fuel pump by disconnecting at the 4pin plug and it was still the same- just to eliminate the filter i removed the filter that i replaced 2000 miles ago and replaced with a free flow unit i:e a length of fuel pipe so i would say that the fuel pump/filter is out of the equation (and i cleaned the gauze filter by running down to the local petrol station and blowing it out with the airline)
i have traced the red wire from the reg unit to the battery, starter solonoid, fuse box, stop switch, starter switch, and back to the starter solonoid via the red/blue wire cant find a braek or dirty connection - i have also run a continuity test thru the wires to make sure altho i cant see that the starter solonoid would drain the amps from the battery until you hit the starter button
the general relay is working fine
the red/white wire that goes to the charging light indicator is fine
the red black wire that goes to the fuse box then to general relay also checks out ok
i have removed all the earth connections and cleaned and replaced
i have disconnected several other components neutral light switch stand switch brake light switches to try and eliminate them draining the system
so the only thing that is left is the generator /stator itself which i have tested and is showing an out put
either i have two dodgy rectifier units or i have missed something
now sitting in a pile of broken fuses a bike that resembles a plate of multi coloured sphaghetti and maybe a multi meter that tells blatant lies-
i have threatened the bike that it WILL be replaced with a VTR but that hasnt worked either

[monstermob 998]

is it possible for genarator/stator to have an intermittent output?
i've checked the wires from the generator there is no evidence of burning or heat build up in the wires

[KeefyB]

Mate,you have connected it up the wrong way round!
It should be,
New- old
yellow- yellow
yellow- yellow
both greens- black
red/whites -red

old reg.
red/white-not used
red/black-not used
The new regulator does not use a charging light.