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post #1 of 3 (permalink) Old Jul 24th, 2007, 4:03 am Thread Starter
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Location: Moscow, , Russia
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need electric advice

How to find the hot wire? I bought a camera on e-Bay and got it with a connector with two wires: one red and the other red-with-black-stripto hook the camera up to the battery. The connecter shows the hot wire must be in the center. I switch on my meter foe DC voltage measuring and touch with one pin the external part of the connector and with the other pin - a wire, one by one. One measurement gives me a value the other - not. What wire leads to the external part of the connector? Is there usual scheme in US - like the red is always hot?
TIA

Take care!

'06 K1200GT Blue (sold)
'09 F800GS Grey
'07 F800ST Blue - wife's(sold)
'09 F650GS Blue - wife's

Last edited by easyman05; Jul 24th, 2007 at 4:29 am.
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post #2 of 3 (permalink) Old Jul 24th, 2007, 9:13 am
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I don't use this 'hot wire' terminology. All wires get hot when they short out!

Here's a basic lesson: Lift the seat, put one end of your meter on a clean bright part of the frame, then touch each battery terminal. The terminal giving no reading is the one connected to the frame, the terminal reading volts on the meter either way, connects to the equipment. The polarity of that battery terminal is what should appear at the centre pin of the BMW auxiliary socket, and the frame is connected to the outside. Poking probes into the accessory socket can cause the fuse to blow, so sometimes you get nothing out!

On our bikes, the battery negative is connected to the frame and the battery positive to the ignition switch and equipment, including the accessory socket centre pin.

I hope your camera has an adaptor or is designed to be connected directly to the voltage source on a car or motorcycle.



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post #3 of 3 (permalink) Old Jul 24th, 2007, 11:36 am Thread Starter
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thank you for the lesson my question was a bit different.
I realised that I made a mistake - I had to measure impedance instead of voltage.

Take care!

'06 K1200GT Blue (sold)
'09 F800GS Grey
'07 F800ST Blue - wife's(sold)
'09 F650GS Blue - wife's
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