Thanks, I downloaded the schematics and looked them over, here are some notes, be advised, all this refers to a 2016 vehicle/schematic:
Front Fog Lamps (RPO T3U) and Rear Fog Lamps (RPO T79)
most info is shown on page 41, it is comprised of three circuits:
Circuit 192 - from Headlamp switch to BCM
Circuit 1317 - is from the BCM to control Fog Relay KR46
Circuit 2234 - +12v output to Fog Light bulbs.
RPO Description
T3U LAMP FRT FOG-FRT FOG
T79 LAMP-FOG, RR (T79 is the ReaR fog lamps, which are only European? canadian?)
here are the page numbers to find the connector picture/description/schematic:
X50A Fuse Block - Underhood X1 page 430
Pin Size Color Circuit Function Terminal Type ID Option
J3 0.5 BN/VT 2234
Front Fog Lamp Supply Voltage III T3U
X50A Fuse Block - Underhood X3 page 434
Pin Size Color Circuit Function Terminal Type ID Option
L5 0.5 BN/WH 1317
Fog Lamp Relay Control I T3U
K9 Body Control Module X1 page 727
Pin Size Color Circuit Function Terminal Type ID Option
4 0.5 RD/BN 2240
Battery Positive Voltage
15 0.35 D-BU/GY 192 Front Fog Lamp Switch Signal T3U
22 0.35 L-GN/GY 13
Headlamp Switch Park Lamp Signal
K9 Body Control Module X5 page 735
Pin Size Color Circuit Function Terminal Type ID Option
10 0.5 BN/WH BN 1317
Fog Lamp Relay Control T3U
S30 Headlamp Switch page 1001
Pin Size Color Circuit Function Terminal Type ID Option
10 0.35 D-BU/GY 192 Front Fog Lamp Switch Signal I T3U
X100 Forward Lamp Harness to Front Bumper Harness (X88 or Z88) page 1122
Pin Size Color Circuit Function Terminal Type ID Option
3 0.5 BN/VT 2234 Front Fog Lamp Supply T3U
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