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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 46 (Exterior Lighting System -- F250-F550 Super Duty) >> Diagnosis & Testing >> Trailer Lamps >> Inspection & Verification

Inspection & Verification

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the customer concern.
  2. Verify the exterior lighting system of the vehicle is operating correctly. If not, refer to the appropriate PINPOINT TEST .
  3. Visually inspect for obvious signs of electrical damage.
    VISUAL INSPECTION CHART

    Electrical
    • Battery Junction Box (BJB) fuse(s):
      • 22 (30A) (Trailer Brake Control (TBC) module)
      • 26 (30A) (trailer tow parking lamps)
      • 55 (10A) (trailer tow battery charge relay coil)
      • 70 (10A) (trailer tow reversing lamps)
      • 90 (25A) (trailer tow battery charge relay switch side)
      • 100 (25A) (trailer tow turn relays)
    • Body Control Module (BCM) fuse 31 (5A) (stoplamp switch input)
    • Wiring, terminals or connectors
    • Trailer tow connector
    • Trailer tow stop/turn relays
    • Trailer tow battery charge relay
    • Trailer tow parking lamp relay
    • TBC module (aftermarket)
    • Trailer
  4. If the concern is not visually evident, verify the symptom. GO to SYMPTOM CHART .