2007 Nissan Titan

2007 TITAN LE 4WD, WITH 72,000 MILES. IN DEC 2018 MY RIGHT TURN SIGNAL INDICATOR WOULD FLASH ONCE AND QUIT WHILE DRIVING BUT ISSUE IS REPLICATED DRIVING OR STATIONARY, ENGINE ON OR OFF. I HAD THE CRUISE CONTROL ENGAGED AND HITTING THE RIGHT TURN SIGNAL TRIPPED IT OFF, AS IF I'D TAPPED THE BRAKES. A WEEK EARLIER, I STARTED HAVING INTERMITTENT ISSUES WITH MY BACKUP SONAR WARNING SYSTEM THEN COMPLETE FAILURE. LATER TROUBLESHOOTING THE TURN SIGNAL ISSUE, I REALIZED WHEN I HIT THE BRAKE, THE RIGHT FRONT TURN LAMP WOULD ILLUMINATE WHILE THE BRAKE PEDAL WAS DEPRESSED. I REALIZED IF I HELD OR RODE THE BRAKE PEDAL, THEN ENGAGED THE RIGHT TURN SIGNAL, THE RIGHT TURN LAMPS AND INDICATOR WORKED NORMAL, UNTIL I RELEASED THE BRAKE, THEN THE RIGHT TURN SIGNAL LAMPS WOULD QUIT. ALSO NOTICED THAT ALL CLEARANCE LAMPS, TAIL AND STOP LAMPS FLUCTUATED A LITTLE IN SYNC WITH THE TURN SIGNAL OPERATION. I REALIZE I'VE GOT AN ELECTRICAL SHORT. CHECKED WHAT I COULD AND COULD NOT FIND THE PROBLEM AND DECIDED TO TAKE IT TO MY CAR REPAIR GUYS. THIS MORNING, WHEN I STARTED IT FOR THE TRIP, I HAD WARNING LIGHTS ON FOR LOW TIRE PRESSURE (FLASHING, THEN STEADY, THEN FLASHING), ABS (STEADY) AND SLP (STEADY), AND SAID IT WAS IN 4WD WHEN THE DIAL WAS IN 2WD. NEVER HAD THAT HAPPEN BEFORE. AFTER 5 MILES THE 4WD INDICATOR WENT OFF AND THE 2/4WD GRAPHIC WAS BACK MY SHOP FOUND A MELTED WIRE BUNDLE ABOVE MY EXHAUST WHERE THE TAILPIPE EXITS THE MUFFLER. THEY SAY IT LOOKS LIKE A HEAT SHIELD IS EITHER MISSING OR THAT ONE SHOULD BE THERE. HOWEVER, THE MECHANIC SAYS IT IS NOT SAFE TO DRIVE AS SEVERAL KEY SYSTEMS WIRES PASS IN THAT BUNDLE THAT HAS INDICATIONS OF EXCESS HEAT AND MAY HAVE PARTIALLY MELTED WHICH COULD CREATE SHORTS THAT COULD MAKE OTHER VITAL SYSTEMS FAIL, OR CREATE A FIRE HAZARD. I'VE SEEN SEVERAL OTHER REPORTS OF SIMILAR ISSUES ONLINE. STILL IN THE PROCESS OF DIAGNOSING AND REPAIR.