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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 137 (MULTIFUNCTION Electronic Modules - F150) >> Diagnosis And Testing >> Upfitter Relay Box >> Inspection and Verification

Inspection and Verification

WARNING: This page is about a different car, the 2012 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the customer concern.
  2. Visually inspect for obvious signs of electrical damage.
    VISUAL INSPECTION CHART

    Electrical
    • Battery Junction Box (BJB) fuse(s):
      • 18 (30A) (upfitter relay 1)
      • 19 (30A) (upfitter relay 2)
      • 28 (10A) (upfitter relay 4)
      • 44 (15A) (upfitter relay 3)
    • Body Control Module (BCM) fuse 41 (7.5A) (upfitter switches)
    • Wiring, terminals or connectors
    • Upfitter relay(s)
    • Upfitter switch
  3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  4. If the cause is not visually evident, verify the symptom and GO to Symptom Chart .