i was wondering if there is a thread for the wiring colors on the tC or is it the same as the xA or xB? if there isnt, can anyone tell me where the wiring harness for the ignition power wire is on a tC and which color wire is for the ignition bc thats where i plan to tap for constant power to go to my underbody LEDs.

 

05 Scion tC- Wire colors

Wire: Wire color/ Polarity / Location

12volts: red or white/ + /ignition harness
Starter: black / + /ignition harness
2nd Starter: green / + /ignition harness
Ignition: blue / + /ignition harness
2nd Ignition: yellow / + /ignition harness
Accessory: gray / + /ignition harness
Keysense: black / - / ignition harness
Power Lock: green with blue stripe/ - / driver kick, 20 pin plug, pin 15
Power Unlock: purple with pink stripe (double pulse)/ - / driver kick, 20 pin plug, pin 14
Parking Lights: brown/ + /top of fuse box, 30 pin plug, pin 29
Parking Lights: brown / - /headlight switch
Reverse Light: pink / + / top of fuse box, 14 pin plug, pin 2
Door Trigger: orange (D), blue (P)/ - /top of fuse box
Dome Supervision: blue/ - /L side of fusebox, 6 pin plug, pin 2
Trunk/Hatch Pin: purple/ - /top of fuse box, 30 pin plug, pin 7
Trunk/Hatch Release: orange/ - /driver kick, gry 12 pin plug, pin 12
Tachometer: black / ac / data link conn. under dash, pin 9
Brake Wire: blue / + /brake pedal switch
Parking Brake: black/ - /parking brake switch
Horn Trigger: white / - /horn switch

 

will the red or white 12volt wire from the ignition harness always be hot? regardless?

 

uhhh... why don't you just hook it up directly to the battery for constant power..? that's what i did...

nothing's more constant than hooking it up to the source.... just ya know.. fuse it.