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Discussion Starter #1
I want to attach the lights in the new top box on my 2003 Volusia. I have the diodes and resistor worked out and a board made to turn the single lights into brake and running. Now I just need to tap into the power for brake and running.

Where is the best place to tap in? I don’t really want to use the rear light fixture as running a wire from there to the top box would be very unsightly. Ideally the wire would come along the fender mount, up the rear carrier mount and then there would be a connector i can attach the top box to.
 

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There is a plug under the seat neat the battery where it goes to the rear part of the fender. I tied into that and ran the wire into the gap between the fender strut and fender. I had a plug under the seat and a plug tucked under the rack that I mounted the trunk. If you are running led lights consider using Cat 5 or 6 with a black sheath. It is stranded wire 4 pairs. I bought a rubber connector with 6 pins from a RV place and spliced it into my trunk harness. It is much like a normal flat 4 trailer plug but has more pins. I had signals mounted to the underside of the trunk rack and Brake and running light on the trunk and rack. The OEM Suzuki Billet rack is not very robust for mounting a trunk.
 

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Thanks. I found the connector under the seat. Was going to use cat 5 but do not have any in black plenum.

How did you splice into the wires? Rear of the connector is not a lot of space so a quick splice is not going to work as I need both running and brake. And may want to splice in to blinkers later. Guess I’m going to have to pull back the sheathing and solder.

This would all be a lot easier if I didn’t live I. A high rise.
 

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I got a plug connector male and female and spliced it into the bike side of the under seat harness. I got it at a surplus place that had a bunch of different plugs. 2, 4, 6, 8 12 circuits. I'm not sure if I was able to pop the original Suzuki pins and heat shrink my tie in to the harness or if I just taped each wire where I tied into. Strip some insulation and wrap the wire and solder. That way if something went bad with the tail light harness you could replace it with a stock harness. I moved it all from an 05 C50 to a 09 and just had to tie into the harness with another plug. I just unplugged my trunk harness plug and removed the rest. New owner might have wondered why there was an empty plug by the battery! I don't have any pictures of what I did when I had the Trunk on the Suzuki. I bought a Harley vinyl Tour Pak. It matched well with the leather saddle bags and was Pricey but very good. I was able to upgrade the trunk to a leather version at some point. The vinyl covered version was quite good. It was a no cost upgrade, could have stayed with the vinyl. I had made a stainless steel bracket to mount a brake tail light bar behind the passenger back rest and had another under the trunk mounted to the back edge of the rack. I had bought two of the Custom Dynamics light bars with the flashing brake alert. Very bright and they looked nice. They have different versions available.

https://www.customdynamics.com/dual-intensity-led-light-bar-with-flashing-brake-alert?cat=50
 

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Discussion Starter #5 (Edited)
Thanks. I have been anguishing over whether to splice in on the bike side or after the connector.

I already have.a connector under the top box so I can remove the box and take it in with me to motel or house. The box I bought has a quick dismount so that made sense.

I considered making my own flasher circuit and thought of getting fancy with chaser turn signals and crazy stuff like a Night a rider mode but settled on a resistor and some diodes to turn the two wire brake light built in to the top box into brake and running lights.

Writing this, I think I’ll splice in after the connector so that I can remove the fender without having to put another connector.

Thanks for your help.
 
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