function eventJeepEnter(jeep, player)
  -- Do whatever
end

function eventJeepExit(jeep, player)
  -- Do whatever
end

function SetupJeepOutputs(jeepid)
   local gmf1 = _EntCreate("gmod_runfunction")
   _EntSetKeyValue(gmf1, "FunctionName", "eventJeepEnter")
   _EntSetKeyValue(gmf1, "TargetName", "JeepEnterFunc" .. gmf1)
   _EntSpawn(gmf1)

   local gmf2 = _EntCreate("gmod_runfunction")
   _EntSetKeyValue(gmf2, "FunctionName", "eventJeepExit")
   _EntSetKeyValue(gmf2, "TargetName", "JeepExitFunc" .. gmf2)
   _EntSpawn(gmf2)

   _EntFire(jeepid, "AddOutput", "PlayerOn JeepEnterFunc" .. gmf1 .. ",RunScript,,", 0)
   _EntFire(jeepid, "AddOutput", "PlayerOff JeepExitFunc" .. gmf2 .. ",RunScript,,", 0)
end