I’m trying to get the cruise to work on my 83 XJ6 VP. I have removed the bellows unit from the engine compartment. Both solenoids are clicking when powered. I used my vacuum pump at the nipple. The solenoid holds vacuum, but the bellows don’t contract. Do both solenoids have be powered? I also noticed I hear air escaping when I depress the bellow. The bellow is new, but I assume I need to use silicon to seal it to the metal plates?
Any help appreciated to complete my testing!