How to Wire 12V Dimmers and 2-Way Dimmers - Branch Circuits | Ep 9/10
May 25, 2025 · 7 min · 11K views
What this video covers
Wiring a 12V DC dimmer in a branch circuit requires three connections: positive input from the fuse block (red), positive output to the lighting circuit (black), and a shared negative (white) joined at a lever nut to both the fuse block negative and the light negative.1:22 Nate demonstrates this on a Blue Sea Blade Fuse Block, with the Victron Lynx distributor mentioned as the upstream distribution point.0:35 A single dimmer wired this way works cleanly, allowing full range from off to full brightness.2:51 Two-way dimmer circuits — wiring two dimmers in series so lights can be controlled from multiple locations, a common request for camper vans — do not work.3:11 Nate wires two dimmers in series and shows the result: the lights flash erratically because each dimmer independently chops the power signal with no awareness of the other's position, producing interference rather than smooth dimming.4:42 The only reliable solution for multi-point dimming is a software-based system; Nate identifies the RedArc TVMS Rogue as one such device, capable of controlling on/off and dimming from multiple switches, a wall touchscreen, and a phone app.6:43
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