RAM 3500 Van V8-5.9L VIN Z LDC (1998)
Vacuum Reservoir HVAC: Description and Operation
SYSTEM OPERATION
The vacuum reservoir is mounted in the engine compartment on the right cowl side panel near the speed control servo and below the right
headlamp. The right front fender extension panel must be removed from the vehicle to access the vacuum reservoir for service.
Engine vacuum is stored in the vacuum reservoir. The stored vacuum is used to operate the vacuum-controlled vehicle accessories during periods
of low engine vacuum such as when the vehicle is climbing a steep grade, or under other high engine load operating conditions.
The vacuum reservoir cannot be repaired and, if faulty or damaged, it must be replaced.
