Good question, I want to do this to my truck as well. Maybe this helps, it says the headlight switch is white with a light green stripe. I hope this helps.
DIRECTWIRE™ WIRING INFORMATION - DODGE / RAM PICKUP / 2005 / Accessory
[PRINT THIS PAGE]
12volts red (40A), red (40A) + ignition harness
Ignition pink/white + ignition harness
Parking Lights+ white/yel (L), white/gray (R) + harness at top of driver fender
Parking Lights- white/lt. green - headlight switch
Notes: Parking lights are negative trigger thru a 590 ohm resistor. MUST use a relay.
Headlight white/lt. green - headlight switch
Notes: Headlights and parking lights are negative trigger thru a 1100 ohm resistor. MUST use a relay.
Trunk/Hatch Release N/A
Power Sliding Door N/A
Speed Sense dk. green/yellow PCM, black plug, pin 13
Notes: The PCM is on the passenger side firewall.
On SRT-10 models, the vss wire is in the white plug, pin 27.
On diesel models, the vss wire is at the ECM on the lower driver side of the engine, 50 pin plug, pin 11.
Wipers brown/wht (L), brown/org (H) + windshield wiper motor
LF Window up/dn orange/lt. green - orange/wht A driver window switch in door
RF Window up/dn orange/tan - orange/gray A driver kick, door harness
LR Window up/dn orange/white - orange/gray A driver kick, door harness
RR Window up/dn orange/lt. blu -orange/dk. blu A driver kick, door harness
Sun Roof open/close motor part of module
Sun Roof Limit/close N/A
Memory Seat 1 N/A
Memory Seat 2 N/A
Memory Seat 3 N/A
Immobilizer Bypass Module: Required: Yes Type: Sentry Key Part #: 555C, 556U, or 555U
Notes: Only vehicles with gray keys have the immobilizer.
