Visual/Physical Inspection
VISUAL/PHYSICAL UNDERHOOD INSPECTIONA careful visual and physical underhood inspection must be performed as part of any diagnostic procedure or in finding the cause of a failure. This can often lead to fixing a problem without further steps. Inspect all wires in engine compartment for proper connections, burned or chafed spots, pinched wires, contact with sharp edges or hot exhaust manifolds. This visual/physical inspection is very important. It must be done carefully and thoroughly.