Searching for the right trailer wiring can be tiresome. There are many industry standards that don't lend themselves useful to the layman. Every standard is there for a reason, so don't go wiring your ...
I take it you need a 4-pin to 4-pin firewire cable? Most pc laptops and camcorders have 4-pin and should be common enough. I myself keep a 6-pin to 6-pin, 4-pin to 4-pin, and 6-pin to 4-pin firewire ...
On page 4, there is an "IDE Power" connector. It looks a lot like a 4 pin CPU fan connector, but it (obviously) provides different voltages that are appropriate for 3.5" IDE drives (5V, 12V) and the ...