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5-1 7
1977 PONTIAC SERVICE MANUAL
150 LB. IN.
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FRAME CROSSMEMBER
HOSE ASSEMBLY
/
/
PlPE ASSEMBLY
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\CLIPS
(3) PART OF REAR
AXLE HOUSING
A S S E M B L Y .
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Q ' ,
I
y &
150 LB. IN.
4
RIGHT PlPE ASSEMBLY
RECOMMENDED PROCEDURE:
TOROUE BOLT AFTER BRAKE PIPES HAVE BEEN
SECURED AT WHEEL CYLINDERS AND BRAKE
HOSE
TEE, AND THEN CLIP PIPES TO AXLE TUBES.
LEFT PlPE
7
V
TO BE INSTALLED TO CARRIER
ASSEMBLY
VIEW
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PARALLEL TO
OF
CAR.
Fig.
5-18 Rear Brake Pipes
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B
Series
PARKING BRAKE SWITCH
ADJUSTMENT
H Series
With the ignition switch "On", the brake warning light
should not light with the parking brake lever fully released
but should light with the lever applied in the first notch
(click).
1. Check that the brake warning light (on the dash) does
not light with the parking brake lever fully released (ignition
"On").
2. Apply the parking brake lever (1) notch; the brake
light should come on.
3. If the light remained on in Step 1 or did not come on
in Step 2, lift up on the rear of the lever cover.
4. Adjust the switch, as necessary, by bending the tab
on the driver side of the lever assembly. Recheck switch
operation.
Avoid excessive bending of the tab. Check the tab for
cracks; if cracking is evident, the lever assembly must be
replaced.
COMBINATION VALVE
Testing Electrical Circuit of Combination Valve
1. Disconnect wire from switch terminal and use a
jumper to connect wire to a good ground.
2. Turn ignition key to "On"
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warning lamp should
light. If lamp does not light, bulb is burned out or electrical
circuit is defective. Replace bulb or repair electrical circuit
as necessary.
3. When warning lamp lights, turn ignition switch off.
Disconnect jumper and reconnect wire to switch terminal.
Testing Warning Light Switch Portion of
Combination Valve
1. Attach a bleeder hose to a rear brake bleed screw and
immerse the other end of the hose in a container partially
filled with clean brake fluid. Be sure master cylinder
reservoirs are full.
2. Turn ignition switch to "On"
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open bleeder screw
while a helper applies moderate pressure to the brake pedal.
Warning lamp should light. Close bleeder screw before helper
releases brake pedal. Reapply brake pedal with moderate-to-
heavy pressure. Light should go out.
3. Attach the bleeder hose to a front brake bleeder screw
and repeat above test. Warning lamp action should be the
same as in Step No. 2. Turn ignition switch off.
4. If warning lamp does not light during Steps
2 and 3
but does light when a jumper is connected to ground, the
warning light switch portion of the combination valve is
defective. Do not attempt to disassemble the combination
valve. If any portion of the combination valve is defective,
it must be replaced with a new combination valve.
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