General electrics

Is anyone able to help - I've a fault with the starter circuit: switch on the ignition, allow the needle to do its 'sweep' but press the starter button and the 10 amp fuse blows - wink, out go all the lights.
At first I thought it was the starter solenoid, as it was a bit corroded, but after replacing it the problem persists.
The wiring looks all ok between the starter button and the battery area and between the battery area and the starter motor.
When I tested the rectifier I got a dodgy continuity from the white connector - but i found it tricky to test properly as all the wires are the same colour - no way of telling which is positive or negative?
The starter motor seems ok - when I called the RAC out he got the bike going by sending a current direct to the motor (from a battery pack thing).
My grasp of electrics isn't great - I can just about cope with the wiring on my CB500..
Before I install the new rectifier is there anything else I should test? Does anyone have a decent wiring diagram that illustrates what connectors do what?

Many thanks
S
2007 SD

The diagram is in the download section of the how to tread, it is also in the workshop manual. Same place, if you can't find it PM me with an email address and I'll mail it to you.

There is the main starter relay on the side of the battery box but there is also a auxiliary starter relay under the seat, you need to check both.
The power for these runs also via the dummy plug for the alarm, or the alarm if you have one installed. You need to check all these.
To avoid blowing fuses put a second test light over the fuse holder, the light will go bright when you have a short.
All I can say is that you need to follow the circuit trough by starting at the beginning.
First pull the aux relay under the seat and push the starter button, if nothing happens that's good, if the fuse blows (or your test light as explained glows) you have a short in that section.
If OK do the same but pull the 30A fuse at the main starter relay and see what happens there.
Hope this helps! Don't worry it is not that complicated once you got the diagram.