Wiring diagram for the Coupler-On Harness for Mini Turn Signal Switch (SR400/500 '85-'00)
Wiring diagram for the Mini Turn Signal Switch Coupler-On Kit for SR400/500 ('85-'00). Explains the coupler pin layout and the role of each pin, where to connect on the switch side, and points to note when cutting and securing the wires.
- Pin numbers and roles on the bike-side coupler (horn, turn signals, ground, etc.)
- How to connect each harness wire to the matching position on the mini turn signal switch
- Preventing stray wire strands and securing the ground wire
The Mini Turn Signal Switch Coupler-On Kit is a harness kit that lets you connect a mini turn signal switch simply by plugging into the stock switch coupler on the SR400/500 ('85-'00).
Based on the supplied wiring diagram, this page explains the coupler pin layout, connections on the switch side, and points to note when routing the wiring.
01 Preparing and connecting the harness
Cut the harness to the length you like. Strip the insulation, insert each wire into the matching position on the switch (see diagram below), and secure it with the screw.
02 Coupler pin layout
| Pin No. | Function |
|---|---|
| 1 | (not specified) |
| 2 | Horn |
| 3 | (not specified) |
| 4 | Turn signal relay |
| 5 | Ground |
| 6 | R turn signal |
| 7 | L turn signal |
| 8 | Positive power (FREE) |
| 9 | (not specified) |
03 Wiring notes
Exposed wire strands can cause malfunctions, so trim them so none stick out.
Strip a longer length of insulation from the ground wire, and clamp the wire itself to the handlebar together with the cover.
After connecting, be sure to check that the turn signals (left and right) and horn work. If you are unsure about the wiring, please have the work done by someone with the proper knowledge or by a custom shop. If you have any questions, please contact us via our contact form.
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*Installation is at your own risk. If you're unsure about doing the work yourself, we recommend consulting your local motorcycle shop.
*The content and photos reflect the time of writing. Please check each product page for current specifications, fitment and stock.