[PDF] 7 Color Series 35 PSI, 60 PSI, 100 PSI Boost Gauge purchased at www.GlowShift Connecting the Power Wire Harness 9. 4. To make the wiring of your gauges easier you can purchase an expandable circuit. This component easily fits into your fuse panel and provides an additional fused power wire for accessories such as gauges. The expandable circuit is available for purchase at www.GlowShift.[PDF] 3 Gauge Wiring Kit Instructions - glowshift For Full Warranty Information Visit GlowShift 3 Gauge Wiring Kit Instructions 1. Red Wire – Connects to a Switched 12 Volt Source. This wire should be connected to an ignition source that turns power on and off with your vehicle. 2. Yellow Wire – Connects to a Constant 12 Volt Source. This wire directly connects to your car’s battery.