Ford F-150 1999 Workshop Manual page 7

1999 F-150/250 Workshop Manual
A9 CHECK THE CONTROL ASSEMBLY
Inline Vacuum Harness
A10 LEAK TEST THE CONTROL ASSEMBLY
Function Selector Switch Vacuum
A11 CHECK THE SUPPLY HOSE FOR OBSTRUCTIONS
http://www.fordtechservice.dealerconnection.com/pubs/con...
No
RECONNECT the function selector switch supply hose. GO to
Connect a vacuum tester to the black hose and plug the other hoses.
At each function selector switch position, apply 51 kPa (15 in-Hg) of vacuum and check for a vacuum drop.
Does the vacuum drop exceed 3.37 kPa (1 in-Hg) per minute?
Yes
NOTE the function selector switch position where the vacuum drops. GO to
No
RECONNECT the inline vacuum harness connector. GO to
Connect a vacuum pump to the function selector switch supply port and plug the control port that indicated a leak
in Step A9.
Select the function selector switch position that indicated a leak in Step A9 and then apply 51 kPa (15 in-Hg) of
vacuum.
Does the vacuum drop exceed 1.68 kPa (1/2 in-Hg) per minute?
Yes
REPLACE the function selector switch. TEST the system for normal operation.
No
RECONNECT the function selector switch vacuum connector. GO to
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A9 .
A10 .
A11 .
A12 .
8/16/2010