BOOST GAGUGE

Turbocharged400sbc

3800 & 4T80E > ALL
TCG Premium
Jun 16, 2007
32,644
16,111
hangover park IL
if your referring to a wire to tap into for illuminating the gauge youll have to tap into one of the many grey wires that feed to any of the ilumination bulbs....or at pin 48 of connector C1 at the BCM

the dimmer switch sends the signal to the BCM which is what regulates the voltage to adj brightness of the cluster/hvac/control button lamps/etc, etc
 
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