My 1999 Range Rover 4.0 SE suddenly started losing power and sputtering and soon there after stalled out. An under hood check revealed contact relay RL-19 buzzing loudly. Swapping another R6K7 resulted in the same buzzing outcome. It’s my first Land Rover, bought it with 205,500 miles it’s at 222,250 miles now and has been running strong. I am not a mechanic, And would appreciate any insight into how I can personally fix it.