ducatipaso.org

Hi All. From Michael in London. I bought a 906 paso with 33,000 miles on the clock which appears to be genuine. I bought it as a non runner and have since rewired using a second hand loom and she now runs well with everything working except, I cannot fathom how to get the battery light to go out! I have tried using two different regulators and fiddled with the earths etc, but to no avail. I have a suspicion that it is not a faulty part, but possibly the way I have connected something. The alternator/generator is located (I understand from the workshop manual) within the left side crankcase! Does anybody have any clues?

Thank you all for your assistance in advance.

Michael

London

Hi Michael,

you connected it according to the wiring diagram ? (P750 and 906 regulators are the same so connections are also)
Is it an original or an aftermarket part or of another Duc ?

here some links:

http://www.geocities.com/750paso/paso/faultfinding.pdf

http://ducatipaso.org/modules.php?name= ... tor+yellow

http://www.geocities.com/MotorCity/Fact ... lator.html

http://www.electrosport.com/Images/fitting.esr510.a.pdf

Gerhard

Dear Gerhard,

Thank you for your reply. I wired as per the diagram in my workshop manual, which is not that easy for me to follow. Perhaps it might be the generator/alternator wiring circuit. I need to follow the patern once more. I was really looking for tips, but I guess it's trial and eror as all ways! Kind regards Michael

check the coloured P750 wiring scheme that may make it a bit easier to follow.
Your battery is ok ? I assume you`re using an original regulator ?

Hi. Thanks for your reply once more. Yes the battery light stays on when the battery is fully charged and I have tried to original regulators on the bike. As they are original, they probably don't last forever and this could be the problem. The bike is 1991! Maybe it's reasonable to accept that the two regulators I have could be faulty. 'll check the wiring again and the 750 diagram. Any ideas where I might find the 750 diagram. Thanks Regards Michael

Hi Michael,

in the link below you can get the colour wiring scheme
(thanks Gerhard)

http://www.box.net/public/q1jdmz8ub9

Ciao

Thank you Gerhard. I'll let you know how it go's.

Happy Easter

Michael

Michael,

in the P750 forum there`s a thread with downloads. There you`ll find also the HAYNES manual (at least the important parts of it). It`s described there how you can measure the regulator.
As mine went south I ordered a new original one from Ducati and in fact that one didn`t work either so I brought it back. After that I switched to an aftermarket one and since then I never had a problem again.

G.

http://www.box.net/public/oq4fober14

first file, last page


(if your regulator should be wired correctly do you have the ground connection of the regulator housing ?)

Dear All,

Thank you for your assistance with suggestions on the wiring/regulator issue. With your help, I have managed to locate the wiring fault, which was a frayed disconnected red wire, which is part of three wires coming from the left side crankcase to the alternator. These follow through to the regulator. I still need to test the regulator/charging system tomorrow, after charging the battery tonite. Fingers crossed. Then its my first ride on my machine, to clean the discs with the worn pads and fit the new ones front and rear. Any tips?

Thanks Michael

so battery light is off now ?
Nothing special about changing the brakes or cleaning them. For the discs some sandpaper and brake disc cleaner do the job, changing the pads is like on every other bike.

G.

Hi G. No its's not! Boring, but I have to dig deeper today. kind regards and thanks for the brake info.

Hi G,

I took the cover off which houses the alternator to follow the three wires 2 pink and one red. Only the two pink are connected to the alternator, but the wiring diagram on 750 & 906 says that there are three wires connected to the alternator. my workshop manaul does not give a detailed explanation of how and where the red wire is attached? help Thanks Michael

ok, I`ll check on my own bike, just have to see in which box my whole wiring loom is
I`m not sure if there were Pasos with a 2 wire alternator. The 907ie did and also Supersport/Monster did have these. Could also be that someone replaced it once.
I assume that your regulator is one with wires coming out of it or one with flat contacts ? If it`s the first there may be 2 yellow and 2 red wires coming out of it plus 2 more, right ? (the 2 red in the middle of the 6 cables). In this case the 2 red cables should join and run towards the battery.
I`m just thinking loud, let me take a look first ...

Gerhard

PS: although already mentioned, ground connection of the regulator housing is very important

ok my wiring loom is of no help as with the aftermarket regulator it`s a bit different.
However looking at circuit diagrams of 907ie, Supersport or Monster it shows that the 2 (middle) red wires of the regulator are connected.

http://www.box.net/shared/3elasen7q7

Hard to give a recommendation here. As asked in my last post, what kind of regulator is is the old with spade contacts or one with wires coming out of the housing ?

G.