One problem related to back up lights has been reported for the 2003 Jeep Grand Cherokee. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Jeep Grand Cherokee based on all problems reported for the 2003 Grand Cherokee.
Both left side & right side rear brake lights fail when applying brakes with headlights on. The 3rd brake light above rear hatch door does operate however. All 3 rear brake lights do operate properly with headlights off (daytime driving). Condition exists when car is in motion on city streets or highways or while stationary either parked or idling. Turn signals or back up lights are not affected.