Pontiac tempest 1968 Service Manual page 64

CUSTOM A I R C O N D I T I O N I N G
1A-37
Fig. 1 A - 5 3 Air System Body Interior - Firebird
TO ADJUST
NOTE: All adjustments to be made after cable
has been connected securely at both ends.
1. Cable is to be securely attached at control and
heater.
2. Rotate temperature control knob counterclock­
wise to full cold (all blue bars showing in dial open­
ing) and hold in this position.
3. Looking through glove box opening, insert 3/16"
-diameter gauge pin into left indexing hole in heater
cam.
4. Adjust turnbuckle by threading left or right until
pin falls into matching indexing hole in cam bracket.
5. Remove gauge pin and turn temperature control
knob clockwise to full heat position (all red bars
showing).
6. Rotate knob back to full cold position and re­
insert gauge pin.
7. If pin falls into both heater cam and cam
bracket indexing holes and all blue bars shown on
dial, the cable is properly adjusted.
8. If any of the red bars show, repeat steps 3 thru
7 until cable is properly adjusted.
T E M P E S T
1. Remove cold air duct.
2. Disconnect cable at control panel.
3. Remove glove box.