Patent ID: 8592685

Claim:
A wiring harness installation structure in which a grommet is fittingly mounted in a harness insertion hole, which is formed so as to penetrate through a body panel which separates an interior area and an exterior area of a vehicle compartment, for holding a wiring harness inserted through the harness insertion hole and a protector having a cylindrical construction which accommodates the wiring harness for protection is equipped in a harness installation path in the exterior area of the vehicle compartment, wherein the grommet includes: a panel fitting tubular portion which is fittingly held in the harness insertion hole and through which the wiring harness is inserted: and an extension tubular portion which is formed at an end portion of the panel fitting tubular portion in a side of the exterior area of the vehicle compartment so as to extend from the end portion while surrounding a periphery of the wiring harness, wherein the extension tubular portion has a required length to fittingly connect an end portion of the extension tubular portion to the protector which is arranged adjacent to the grommet, thereby prevent an exposure of the wiring harness from the body panel to the protector, wherein a water stop treatment is disposed on a fitting portion between the protector and the extension tubular portion, wherein the harness insertion hole formed in the body panel is higher in position than an end portion of the protector to which the grommet is fitted in order to prevent water from infiltrating the interior area.