Interstate fairing wiring ?

[Dark]

My 99 Interstate has an always on cigarette lighter in the fairing. I want to modify it so that is only on with ignition on. I also have a voltmeter to install.
My initial thought is to use the hot wire (10 amp inline fuse) for the always on cigarette lighter as power input on a relay and then output the lighter and voltmeter from the relay.

Am I on the right track?

If so, what can I tap in to in the fairing to trigger the relay when ignition is on?

If not on the right track can someone offer up an alternate idea?

Thanks in advance

[Dred]

Yes, you are on the right track.  I would tap the running lights for the relay's signal.

[Dark]

Yes, you are on the right track.  I would tap the running lights for the relay's signal.

Thanks, was hoping to get it done tonight but it's to cold in the garage. Maybe tomorrow night.

[Dark]

I was gathering up needed tools & parts this morning and came across a 4 circuit fuse block I picked up to use for wiring up the GPS mount & auxillery lights on my old Beemer.
Now I'm thinking of using this so with one relay I can wire up the gps, USB outlet, & powerlet outlet ( replace) the cigarette lighter.
Sound like a reasonable plan?
Anything I may not be taking into consideration ?
Looks like it will warm up enough in charlotte today to get a ride in then tackle this project this eve

[Dred]

If you're going to run 4 power leads ... a fuse block might make sense.  I would use it if I had circuits with different power demands which I wanted to protect with fuses.

As long as the power tap for the cigarette lighter is sufficient ... ~12g ... you shouldn't have a problem powering the accessories you mention through a single 10A fuse.  The variable is whatever you might plug into the powerlet ... a cigarette lighter draws heavy, but most 12V accessories powered by a powerlet do not draw nearly has heavily.

[PhredValk]

I have a 6 point fuse box attached to a piece of 1/4 plywood along with a power point and a couple of USB ports under the seat behind the battery. It powers my GPS, Ipod and cig lighter, as well as my Danmark fuel valve and voltmeter.
I runs off the battery thru a relay triggered by an accessory wire. I used a circuit tester to find a wire that is only hot with the key in Run, one hot with the key in Aux and one hot in both positions.
Fred.