Nelson, if it is the later style 3 phase one, the reg does not have a voltage sensing lead or a charge light lead (brown and red/white wires). Is either of these wires connected into the output plug on the regulator?
Denzel Maybe you could clarify for me on the 1098, after the 30A fuse there are 2 red wires going/from the reg/rec I ass-umed one would be a sensing lead, is it not? Could be they just doubled up on the output leads I suppose and the sensing is done internally. Just curious John
As far as I can see from the 748 wiring diagrams, there should be a 40Amp fuse in the reg/rec circuit. AL
Arquebus On the diagram I have for the 916/748 on the main output line there is a 30A fuse, maybe your diagram is for a different year but whatever the line has a main fuse. The line Nelson is talking about is a 3A fuse on the sensing line & as Derek said it provides power to the RH switch as well, so if it blows no ignition and no starter, dead bike. The 1098 similarly has the 30A fuse, I'm no longer sure if the sensing line is also referenced through that fuse as Denzel stated there is no sensing line and I'm now a bit confused. John
From what I can see from the diagram, if the big fuse has blown (it appears to only protect the reg/rec as it does on all the Ess-esses) then I reckon the small 3A fuse will blow. AL
If the bike is running the later three phase 520W 748/996 system it has a two connection plugs on the reg/rec, one on the ac output from the generator with three yellow wires and the second plug has two reds and two blacks. The two reds are duplicates both going to a 40A regulator fuse, the two blacks follow two paths to earth. The older single phase reg stuck out less power and only needed a 30A fuse. It sounds like the 1098 generator is only 350W but three phase but I would be surprised if it used the older style reg/rec system (I don't know the 1098 system unfortunately). As the later system senses voltage through the red and black DC connections there is no need for the extra sensing connections or a separate earth. In the 748/996 the DC output from reg/rec is always at battery voltage as it is not switched via the ignition ignition and RH handlebar switchgear engine run button. I wondered if the brown wire from the three amp fuse had been reconnected at the reg rec (I dont think it needs to be) or was left hanging uninsulated somewhere However I don't know if Nelson is using a complete 1098 system or just a 1098 generator with a different regulator. Attached is some info on the electrex reg/recs that are supplied for various Ducatis, the RR53 is the one you use for the 3ph 520W system in a 748/996 and I thought was also specified for the 1098
Hi Denz, My rec has four wires coming out. 2 x green - both earthed to battery. 2 x red/white - Modded to be soldered together in to one, in line fuse, then direct to batt live. \Hope this makes sense.
Nelson, are you able to see the brown or red white wires that used to be used for the Reg rec connections? Also have you checked for the current running through the fuse (as stated above)
Denzil & Nelson Just to confirm what the 1098 has, its a 520 W 3 phase alternator, according to the manual. Its wiring is 2 reds, 2 blacks and 3 yellows connected as Denzil stated. It's fused through a 30A fuse Loads of places you can get a service manual John
I measured the amps across the 3amp fuse when the bike started and I got 3.4amps! 1.2 when ticking over. I've popped a 5amp in!
Nelson, you have more work to do (assuming that the brown wire to the original reg/rec has been found and is not resting against something it shouldn't be). The 3A fuse is on the circuit which switches the ecu on. The circuit works by taking 12v through the 3A fuse to the RH switch on the handlebar. With the ignition on and engine run switch in the on position 12v tracks back through the main loom to the ignition relay switching coil (it also goes to the starter button). When power gets to the relay switching coil it closes contacts on the 12v supply to the fuel pump and coils (which are fed from a separate higher current supply via the 3 way ecu power connector). It does this via the big round multiconnector under the tank and a 10 way multiconnector under the front RHS of the seat via an orange/blue wire. You have way too much current running through that circuit and it indicates another fault which will most likely get worse and cause a break down or is a sign of an ecu fault. The first check is to locate the ignition relay under the seat and look for signs of excessive heat either by feel or better by pulling off the connector and looking at the relay pins. Hopefully there is a blackened area around pins 85 or 86 of the relay. In any case change it for a new or known good one then test the current at the fuse as you did before. If the current is still over 3A you need to open up the connectors I referred to above and check the cleanliness of the pins on that circuit, on the 10 way plug it is pin D on the big round plug it should be pin V but the latter one may be different on your bike. Again you may see a burnt pin, particularly on the round main connector under the tank front RHS. If these are in good nick you may have a problem somewhere on the ecu or ecu earth connections.
Thanks for the retail Denzil, nothing on the starter relay. I'll have another look at the other connectors tomorrow. Like you say, still some work to do!
View attachment 13962 Are these the "sensing" wires? Appear to be capped off from the factory, I certainly didn't do it. I have checked and cleaned the big connectors - no change. I've ordered a new relay, should be with me in a few days. Thanks once again...:smile:
is it possible that the standard 1098 would push out more than 3 amps anyway? I would try a 4 amp in future and have a 5 amp with you as back-up.
That was my thoughts Chris, don't want to be off on a Wild Goose chase. Conversely I don't want to breaking down...Again!
As I understand it the 3A fuse has nothing to do with the output of the Alternator. Its a sensing or feedback line if you will, it tells the RR the voltage in the system and from that the RR can determine if its to send the electrical power generated by the Alternator to the system or dump it overboard as heat. Normally these lines are high impedance and draw negligible current. The output line(s) from the RR are the red ones protected by a 30A fuse If Nelson is running a 1098 RR then the sensing line is no longer used, it looks like it was already capped so not sure what was going on there. The Voltage sensing is done internally in the RR on the 1098. I believe Denzel is concerned that the line is drawing too much current and suspects the ignition relay or a potential ECU problem, which is totally separate from the RR swap. John
Denzil and Old Jock Thank you both for your easy to understand plain English explanations, I'm learning a lot from this.
