Originally Posted by mikracer
Could be the switch on the master cylinder. Easy part to swap or you can use a paperclip to jump it. If it works with the jumper, you know the switch has failed.
The switch on the master cylinder fixed mine also. It was intermittent for a year at least. Sometimes when it rained it quit working. Fixed it 2 years ago and has worked perfectly since.
2008 Ford E-350 Quigley 4x4 V10 - 164,000 miles
RB50, PH Top, Dual AGM Group 27 Deka, 2000 Tripplite Inv., No Propane or Water Systems
Van Weight 8,100 pounds, added one rear leaf spring, BFG AT KO LT265/70R17 E Tire press 50psi.