I am familiar with PB Blaster. It's easily 150X better than Liquid Wrench. Liquid Wrench is water compared to this stuff. It's a really good penetrating oil. WD-40 just might not of been a good enough penetrating oil. There could've been carbon build up or just crap in the contact area of the switch and the Blaster helped to clean it off. I would stay away from Brakecleen, as it could damage plastic parts, and in most cases, will!
1997 F-150, 4.6, automatic, Dark Toreador Red, Supercab, Flareside, 4X4 Off-Road, Towing Package, Factory moulded step boards, Ford hvy dty rubber floor mats, Kenwood 10-disk cd changer, Kenwood am/fm cassette head unit, PYLE 2000 Plus speakers, Ford bugshield, Black Manik push bar with 2 KC 100w Daylighters, wheel locks and spare tire lock, Ultra "Claw" wheels, Lund Lunar Visor, Ventshades, AVS slotted taillight covers painted to match, Ford bedliner, Lund Premier tonneau cover, cab and bed professionally undercoated, Code Alarm Sure Start RVS remote starter, Ford alarm, Realistic CB with Wilson Little Wil antenna and Astatic power mic, ported MAF sensor, Motorsport 9mm wires, dual platinum motorcraft plugs, K&N filter, Edelbrock throttle body, billit grille, and Lots of TLC!!