Is there wiring diagrams i can look at to get an idea on how to wire up this bottleneck dynamo to my bike and maby trailer. I've been through pages of internet blah but found nothing yet help please?
It might help if you gave more details about your dynamo, and/or what your problem is.
There are basically three different dynamo wiring systems.
- Single wire, uses the frame as a return ("earth"), relying on the bearings in your headset being conductive between frame and forks, and clamps or mounting bolts being electrically connected to the frame.
- Twin wire, but one of them is electrically connected to the frame.
- Twin wire, isolated.
Similarly lights designed for use with a dynamo. So the main thing is just to be sure that if the lights and dynamo have frame connections, they are consistent. If there is a pair of wires, typically one of them has a stripe on and is the earth wire.
For a trailer, the main thing is going to be reliable connectors that you can easily connect and disconnect. If it lives up to its advertising (and I don't know if it will), this system might help (and it also has some wiring diagrams that might be useful to you anyway: Dyna-Snap). Otherwise maybe something like Anderson Powerpole, or TC-2C1PT
@armb has a good response re: wiring.
Supplementing that, I wouldn't try to wire your trailer with it. You have a little bottle dynamo (also known as friction dynamo) on your front tire. They only put out 5-6 watts on a good day with dry tires (see footnote). Trying to get out more will really stress out the dynamo. They have short lifespans to begin with and you'll only make it shorter. Your front headlight will likely consume 5 watts by itself, leaving 1 watt for the taillight.
And as @armb notes, you'll have a problem with the electrical connection - especially if your dynamo is a single-wire design using frame ground.
If you really want dynamo lights for your trailer, you could either put a bottle dynamo on your trailer itself or put a dynamo hub on one of the trailer wheels.
tl;dr: just get a USB-rechargeable rear-light for your trailer.
Footnote: Some friction dynamos do advertise more power (some up to 24 watts) but I'm highly suspect of them. That's a lot of power to rub off the tire sidewalls and I think you'll find it comes at the expense of shortened tire life, shortened friction wheel life, shortened dynamo life, and considerable drag on the tire.