Quote from: memper on March 26, 2013, 04:03:00 AM
Ok. So tying into the brown wire that feeds the fusebox is not ok?

That will work, but it won't kill the pump unless you turn off the ignition.

If you want to kill the pump with the kill switch it seems like that's OK after looking at the diagrams again. It's the way Ducati did it evidently.

The diagrams in the Haynes manual leave a few things out, or I just can't see them.

According to howie the pump load is within the rating of the fuse in the panel that feeds the kill switch.

Give it a shot.

Ok. I will just open the insulation a bit on the brown wire inbetween the fuses and the general relay and just wrap the pumps hot wire there and see what happens when the ignition is switched on. Doing this today. Will report back. Thank you for the immense help fellas.

Quote from: ducpainter on March 26, 2013, 04:07:33 AM
That will work, but it won't kill the pump unless you turn off the ignition.

If you want to kill the pump with the kill switch it seems like that's OK after looking at the diagrams again. It's the way Ducati did it evidently.

The diagrams in the Haynes manual leave a few things out, or I just can't see them.

According to howie the pump load is within the rating of the fuse in the panel that feeds the kill switch.

Give it a shot.

Howie is assuming this, but, when trying to find an appropriate SS wiring diagram he (I) came across a post by Shazzam (remember him?) that states a carby SS pump draws max 5 amps.  Maybe a DMFr could measure amp draw on theirs since we all know what assume means.

So a 15 amp inline fuse would be too high? If it needs to be lower I can swap out the fuse easy enough.
Or are you suggesting that the amperage on the path (brown to fuses) chosen might be too much for the pump?

Can't answer much without a proper, accurate wiring diagram.  Again, I have no idea why Ducati uses a 15 amp fuse for the pump.

Quote from: memper on March 26, 2013, 05:29:03 AM
So a 15 amp inline fuse would be too high? If it needs to be lower I can swap out the fuse easy enough.
Or are you suggesting that the amperage on the path (brown to fuses) chosen might be too much for the pump?

No, that feed would be safe for the pump...the circuit does not provide amperage. The device draws amperage and the circuit must be capable of handling that load.  I would have no issues wiring it into that brown wire with a 15 amp fuse using 16 gauge wire and letting the ignition switch handle the switching through the relay.

The question is that we don't know...

a) what the pump draws

b) if the wiring on the Monster is different from the SS to accommodate a 15 amp fuse...because that is the purpose of the fuse...protecting the wiring.
If the monster uses lighter gauge wire in the ignition circuit than an SS and you install a 15 amp fuse and you get high resistance at a coil you could burn up your harness if you use the kill switch as in the Haynes diagram with a 15 amp fuse in the panel. If you stick with the 7.5 amp fuse you would be safe.

c) If the Haynes manual is correct about the 15 amp fuse...there are enough inconsistencies in that wiring diagram to make me suspicious.

So you think I should go out and get a 7.5amp fuse to drop in the inline carrier?
Just a note, when I pulled the fuse cover a 15amp fuse was in the 2nd slot. I put in a 7.5 to match the label.

It seems like I was able to download a Ducati Parts manual and some other Manual from Ducati a few years ago i printed it all out. This was for my 750 Monster. Ill look around and see if I can find those links. The Hanes manuals never seem to be as good as the Shop Manual.

Well it works! No fuses tripped and my harness is still in tact. Off to buy a prefilter for the pump

Sorry no Maint. Manal. What I found was an IPC


http://www.ducatiomaha.com/products.asp

Quote from: memper on March 26, 2013, 07:24:58 AM
So you think I should go out and get a 7.5amp fuse to drop in the inline carrier?
Just a note, when I pulled the fuse cover a 15amp fuse was in the 2nd slot. I put in a 7.5 to match the label.

If you wire it through the kill switch like you originally proposed leave the 7.5 in the panel and don't bother with another fuse as the circuit is already fused.

If you tap in to the brown relay wire you can use any fuse that will protect whatever gauge wire you use or is already in the harness. In a house they use 15 amps to protect 14 gauge wire. I'd probably use that for your 16 gauge. Some would recommend a lower amp fuse, but in a DC circuit too low a rated fuse can actually increase resistance and cause other problems. That's why it would be nice to really know what Ducati used in the SS.

I'll see if I can find out.

edit...

Ducati did in fact use a 15 amp fuse in that circuit on the SS. The only time it is probably required is if the pump screen or filter gets dirty and puts more load on the pump.

You can try it with the 7.5 or a 10 and just carry spares or run a 15.

All seems to be fine so far.
Q: what is the hole on the top of the pump? Its a little shaped hole between the terminals. It has a small metal piece inside and under that a spring.

Quote from: memper on March 26, 2013, 10:47:47 AM
All seems to be fine so far.
Q: what is the hole on the top of the pump? Its a little shaped hole between the terminals. It has a small metal piece inside and under that a spring.

The idea is to make sure it doesn't become an issue and strand you.

Don't know...pic?

All I can think of is that its a plug for the fuel light which connects to the sending unit in the tank. My current sender only has the two wires to power the pump. Meaning my pump and sender are from different models. No biggie I guess I can just fill it with gas resistant sealant or epoxy.

Also, while we're on the topic, the run/kill switch is 15amps. The starter button is...30?