Dads50,
So to check the spring function, I should disconnect the yoke, have some one depress the brake pedal and me underneath the truck to watch and see if the pedal returns all the way to the "up" or fully released position. Assuming the pedal returns all the way and disengages the brake lights, that should tell me what, the spring is sufficient and there is a fault with the master cylinder?
If the master cylinder plunger does not fully return is there a fix for that or must the entire master cylinder be removed and replaced with a new one requiring bleeding of all the brake lines?
