thestuarts
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That grey jumper plug is also what brings power to the rear frame blunt cut Ignition and BAT wires. Explains why I've seen a few posts of owners not measuring any voltage there.
De-pin #1 and #4 if you need ignition or BAT inside the cab. I will probably use those for my dash cam.
View attachment 4286
@brutal,
EDIT:
Here is a link to the wiring diagrams.
Please confirm I am interpreting the diagrams and your explanation correctly:
The AUX 6 button in the cab powers pin 2 on the light gray AUX connector under the hood, but pin 2 is jumpered to pin 4 which goes back into the cab as G425 on a violet/yellow wire and terminates at the light gray port (known as "D" or Port_Upfitters_2 or D2621A_Body_D) which is located horizontally aligned with the headlight switch and CAN bus blocks, close to the firewall.
The upfitter kit comes with a gray connector (known as Jumper Port_Upfitters_2) that plugs into Port_Upfitters_2.
- Pins 1 and 6 are jumpered with a red/white wire. Ignition power comes in on pin 6 and goes out on pin 1 which goes to the back of the truck (location "F") and terminates at "blunt cut wires." Pin 6 is on a 20A fuse at location 36.
- Pin 2 is unused.
- Pins 3 and 4 are jumpered with a pink/orange wire. Batter power comes in on pin 3 and goes out on pin 4 which goes to the back of the truck (location "F") and terminates at "blunt cut wires." Pin 3 is on a 20A fuse at location 45.
- Pin 5 comes from pin 4 on light gray AUX port under the hood on a violet/yellow wire which is jumpered to pin 2 which connects to the AUX 6 button. Pin 5 is backed by a 40A fuse at location 37.
This means AUX 6 can power something under the hood (connected to AUX light gray pin 2) and it can simultaneously power something in the cab connected to pin 5 on Port_Upfitters_2.
This also means AUX 1 to AUX 5 are not routed inside the cab, only AUX 6.
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