Hi there!

I'm trying to wire in a voltmeter / thermometer / clock combo device into my bike, but I spent about 2 hours just poking around and looking at things...and I didn't feel confident enough doing anything.

The device has 3 wires - A black negative lead, a red positive and a green lead that connects to the +ve battery terminal.

I'd like the device to come on when I turn the ignition on, or when I switch the lights on, and I'd ideally like it at the front of the bike somewhere, near the dash.

I have a few questions that I thought I'd ask here before possibly causing any major damage to the bike's wiring:

1) Which lead should be the 'switched' one? The -ve or +ve lead?
2) Are there any wires I definitely shouldn't tap into?
3) Anyone know of any wires that would be good to tap into?
4) What's the best way to attach the wires?

Sorry for all the questions - I'm really not very confident when it comes to wiring!

 

Can you put up the make and model of the combo unit?

 

Standard should be like:
Black goes to negative of the battery or any "mass" on the metal frame of the CBR (like you lock it to some frame bolt).
Red should be the straight-to-battery
Green should be the "igniter", so you may lock it to something easy like the frontal light, so it will activate whenever you turn on the lights.

This kind of gadget doesn't drain much power, more or less 1-3 watts, so shouldn't see any consequence about fusibiles. Best it can happen, it's to burn a 10A fusibile. In that eventual case you may just exchange it with a 15W one.

If you lock it to the position light (the small light below the H4 light) you could exchange the light from wire-head to led-light (it turns from 5W to 1W)

But as Bob said, where's the model or scheme?