before we start you must follow these instructions carefully - battery isolator on, key in position 0, hazard light switch in off position, - turn on hazards - turn key to position 1 - turn off hazards - turn on hazards - turn key to position 0 - turn key to position 1 - turn off hazards - turn on hazards - turn key to position 0 - turn key to position 1 - now start the engine - wait NO more than 5 seconds to turn off the hazards - service light should now be out, if this does not work repeat whole procedure until it does, this can sometimes take 3 or 4 goes to work, good luck.