re: Weird door ajar light problem
WD40 is great stuff,Its good for electronics also.I once got my marine VHF radio wet and it stopped working.Just a matter of spraying WD40 inside the radio and it has worked fine ever since.
However WD40 makes for a lousy lubricant,especially in a outdoor situations.WD-40 is really just for Water Displacement...hence the name.
2003 XLT 250 Ford Super Duty Ext Cab. PSD 7.3 Stock.