38mm dual button switch wiring diagram.
Note: This is a 38mm switch designed for older Toyota vehicles (4th Gen 4Runner 2003–2009, FJ Cruiser 2007–2014, and similar). If you have a 2010+ 5th Gen 4Runner or newer Toyota, you likely need the 32mm version.
The dual button switch requires two relays — one for each button/accessory.
⚠️ A Relay Is Required
This switch is designed to carry a signal only — not the full power load of your accessory. Using it without a relay can overload and permanently damage the switch. Always wire your accessory through a relay.
→ Pick up a compatible relay on Amazon
Not sure how to wire the relay? Check out our relay wiring example.
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