2006 Fog relay exact location?

My fog lights don't work on my 2006 Tundra. New lamps, 15 amp fuse at dash is good....where exactly is the fog light relay? None of the relays near the battery are marked fog lights.....help!

 

2006 CAB type determines the location.
For a Access Cab(AC), the fog relay is in Engine Bay
For a Double Cab(DC), it is located inside cab on the integration relay panel which is on back side of fuse panel.

 

BubbaW thank you very much for the great info. My Tundra is a 4 door so I found the relay on the integration relay panel as illustrated. This Tundra is new to me and I've set out trying to figure out why the fog lamps don't work.
So after dark last night i was driving along and realized my hi/lo beam had suddenly stopped working and they were stuck on high beam. They worked before, but suddenly stopped allowing me to take it back to low beam.
Then I realized my fog light switch was on, and when I turned it off, full control came back to my hi/lo beam switch. Turned the fog light switch on again, and the same thing....stuck on high beam.
As I understand it, when the fog lamps are engaged, they will only come on when the hi/lo switch is on low beam. Instead, it is overriding the hi/lo switch and energizing the high beams. The fog lamps have never come on during all these events.
Could the headlight relay be defective? And if so, where is that located?