Originally Posted by gts007
ok so the gray/black wire is the only GEM tap I need to make, correct?
Are you saying the red/blue and yellow/black are part of the radio and NOT the GEM module?
Yes gray/black from GEM
and yellow/black from the radio harness
this is from mossy oaks how-to
Black (BK) - ground (mounted to the mounting bracket)
Yellow/Gray (YE/GY) - console electronics power (goes behind the radio)
Blue/Red (BL/RD) - console display dimmer input (goes behind the radio)
Green/Orange(GN/OR) - Map light power (goes to the dome light)
Black/Blue(BK/BL) - Dome light power (goes to the dome light)
Lt. Blue/White (BL/WH) - Temp sensor (front of the truck)
Lt. Blue/Yellow (BL/YE) - Temp sensor (front of the truck)
Gray/Black (GY/BK) - speed sensor (not used by some, but necessary) (goes behind the radio.
then i ran the yellow/gray, blue/red, and gray/black wires through the headliner.