SOHC.co.uk Forums > CB350/400

Calling the electricians: I've got no power!

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Drew400:
Hi all, especially those of you who like electrics.

I was hoping to attach the battery and turn the engine over a few times on the starter motor (I even have a car battery ready to support the plan). However, I attached the battery, turned the key and nothing happened. So here's what I've done so far (with my rudimentary knowledge of wiring diagrams and multi-tester usage):

1. Battery is relatively new, recently charged and showing 12+volts on the tester.
2. The starter solenoid is live at the point where it's connected to the battery.
3. I removed the block connected to the ignition key under the headstock: every terminal is dead.
4. I have jammed my tester into every wire (especially red ones) and terminal block that I can locate and they're all dead.
5. There's a 2-pin male block connector with red wires as part of my new wiring loom, but no female connector as far as I can tell (you can see it on the photo below on the left above the shiny starter motor cover). I can't see an equivalent on my old loom. What should this be connected to?

I've probably missed something obvious and will be delighted if you can point that out to me!

Thank you,

D.

hairygit:
Maybe a silly question, but is the fusebox plugged in securely? Are the fuses, especially the 15 amp main fuse, check them with a meter, not just look at them!

Drew400:
All questions, silly or otherwise, appreciated.

I will test the fuses properly as you suggest. That said, they were working before I started stripping the bike.

I did separate the block connected to the fuses as part of my 'jamming the tester in every wire' process and could find no voltage in any of the connectors.

Thank you again,

D.

Eyeguy:
that all looks very shiny, as in, powder coated type shiny. Do you have a) a good earth and b) preferably an abundance of them? I'd buzz out the earth strap as the very first thing you do. A complete absence of power means that the fundamental circuit hasn't been made.

I quite like electrical faults, as long as I'm in the mood; its like a jigsaw puzzle, therapeutic!

Cheers

ATG
Paul

Bitsa (Ralph Wright - RIP):
Love electrics the only problem and no use to you is I could fix it quicker than write about it sorry
Check fuses,check earths follow the 12v up the line reds and blacks when you get 12v at the main switch your half way there.If I recall right the blacks have 12v only when ign is on so get the 12v up to the switch
All the best Bitsa

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