I have a 2012 Titan SV crew cab. Have an issue. See photo. My turn signals and Hazards do not function. Another member here told me the blue relays hidden behind the dash have something to do with them. I bought a single relay replacement and tried it in all 3 sockets and no change( I have no idea witch socket is for what or if any of mine aren't working. There are also 2 black relays next to the blue ones. i have no idea what they are for...DO YOU? Lastly, it is said that the BCM (body control module) is the ONLY thing that controls the turn signals and hazards. I am prepared to buy that part as a last resort. Also, as suggested, I did check for burnt wires under the body near the exhaust pipe where the pipe loops over the rear axle and they are ok. And the fuse in the passenger side interior fuse panel are ok.