Originally Posted by
ecyrbh
My 2000 F150 has one from the factory...Its positioned just above the engine oil dipstick...perfect when checking your oil at night in a dimly lit back alley...
My 78' has one that has a mercury switch built in. There is just one wire going to the battery. Should be easy to retro one from another Ford. The reason they don't put them in is they don't want you doing any work on it, they want it taken to the dealer.