Hummer H1 Service Manual page 427

6-44 Wheels and Tires/Central Tire Inflation System (CTIS)
AIR PRESSURE SWITCH REPLACEMENT
WARNING: CTIS components are subject to high air
pressure. Always relieve air pressure before loosening
or removing air system components by disconnecting
quick-disconnect valve assemblies. Failure to follow
this warning may result in serious injury.
NOTE: Front and rear air pressure switches are replaced simi-
larly.
FRONT
AIR PRESSURE
SWITCH
Figure 6-61: Air Pressure Switch Locations
Removal
1. Disconnect harness leads from air pressure switch.
2. Remove air pressure switch from manifold.
CAUTION: Do not allow sealant into air system. Sealant will
damage CTIS components.
Installation
1. Apply sealant to threads and screw air pressure switch into
manifold.
2. Connect harness leads to air pressure switch.
HARNESS
LEADS
_______________
REAR AIR
PRESSURE
SWITCH
MANIFOLD
9-S06-014
®