Build Your Own Switched and Fused Relay Block
I want to add a few powered accessories to my 09 Versys (heated grips, 12v outlet, maybe fog lights).
I've seen some nice tutorials on adding a terminal strip with an inline fuse and relay. It looks a lot better (and safer) than running each item back to the battery.
Just wondering who else has done something like this with their V, where you located the terminal strip and relay, if you have some pics, etc.
My biggest concern is about having the exposed terminal strip under thd seat. It seems like the potential for a short is high.
Anyone else done this?
- total cost is less than $10 vs $90 cost at Twisted Throttle
- Generic 20 amp automotive relay (~$5) sold at most auto parts stores, (4 or 5 pin)
- Inline 12V fuse holder ($1-2) available at most auto parts and electrical stores
- Terminal Block available at Radio Shack, The Source and most electrical supply places
- Soldering Iron and damp sponge for cleaning tip, also solder
- Electrical tape or shrink wrap and heat gun
- Volt meter for testing
This provides a switched, high current source. It will only be active with the key is turned on. If you trigger it from the headlight, it will only be on when the head light is on. All automotive relays work the same. You can save a bundle of cash by using an general purpose automotive relay. It will handle more current than you will ever use. Just wire it as follows and use solder, do not just twist wires. Also insulate connections with shrink wrap and a heat gun or electrical tape.
Terminal Strip with Cover - wire from pin 87 of relay energizes this
Inline Fuse Holder- snip wire in middle and connect one end to + battery terminal and other to pin 30 of relay.
Most Relays are Marked with these Pin Numbers, Four Pin Relays will not have Pin 87a, If not a labelled see pin out diagram below
Pin 30 to POS terminal on battery via inline fuse holder with ~10-20 amp fuse (depending on load), high current
Pin 87 to POS supply terminal on connection strip, high current, all accessories will be powered by this.
Pin 85 to Ground or NEG battery terminal
Pin 86 (trigger wire) to POS wire of head light or other light that is on when the ignition is on. Insignificant power draw
Pin 87a - not used but make sure to insulate this as it is live with the ignition off (reverse of pin 87, not live with pin 87 is) - 4 pin relays will not have a pin 87a
- push twisted wire through hole in relay connector and twist then solder, insulate with electrical tape after
- twist wires to be soldered together first, heat the twisted wire from the bottom with the soldering iron long enough to melt the solder, touching the wires, not the soldering iron tip, to melt. Do not melt hot solder onto cold wires.
- Make sure your soldering iron tip is clean and shiny. Clean with damp sponge or really dirty tip with emery paper.
- Wrap any surfaces that can short with electrical tape including your terminal block after you have done all connections.