Speed Sensor Replacement - Hummer H1 Service Manual

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11. Disengage the modulator alignment pin from the
mounting bracket and remove the modulator from the
mounting bracket.
12. Remove the brake line adapters, noting the position for
reinstallation
Installation
1. Install the brake line adapters in the same position as in the
original modulator. Torque the 12 mm threaded adapter to
11 lb-ft (15 N•m) and the 10 mm adapter to 9 lb-ft (12
N•m).
2. Place the modulator alignment pin in the hole in the
mounting bracket, install the two mount bolts and torque
to 5 lb-ft (7 N•m).
3. Connect the motor pump wire connector to the mounting
bracket and install the assembly on the left air lift bracket
with four bolts, washers and lock washers. Torque the
bolts to 28 lb-ft (38N•m).
4. Connect the four wheel brake lines in their respective
positions on the modulator and torque to 11 lb-ft (15
N•m).
5. Connect the master cylinder hoses in their respective
positions on the modulator and torque to 11 lb-ft (15
N•m).
6. Connect the thirteen-pin, the two-pin and the one-pin wire
connectors to the modulator assembly.
7. Install the horn bracket and horns.
8. Install the left front splash shield.
9. Bleed the complete brake system.
10. Connect the batteries.

SPEED SENSOR REPLACEMENT

NOTE: The procedure for speed sensor replacement is basi-
cally the same for all four wheel ends.
WARNING: Connect speed sensors to the proper har-
ness connectors. Connecting speed sensors to incorrect
harness connectors can cause the ABS/TT4 to malfunc-
tion.
Removal
1. Rotate and pull the speed sensor head from the speed sen-
sor mounting bracket and retaining sleeve (Figure 7-56).
2. Remove and discard the speed sensor retaining sleeve.
05745159
Figure 7-56: Speed Sensor Removal
3. Remove the speed sensor connector from the retaining clip
near the top of the upper A-arm and disconnect the speed
sensor lead from the speed sensor harness (Figure 7-57).
4. Remove the capscrews and clips securing the speed sensor
lead to the A-arm and geared hub, and remove the sensor
from the vehicle.
Figure 7-57: Speed Sensor Connection
Brake System 7-49
CLIP
SENSOR
CONNECTOR
9-S07-015