10.7
CRUISE CONTROL INOPERATIVE
1. Turn ignition ON.
2. Disconnect the vehicle harness connector at the ECM.
3. Turn cruise enable switch to ON.
4. Measure resistance between the cruise enable cavity (i.e. F2) on the vehicle harness
connector and a good ground.
[a] If the resistance measurement is greater than 5 , or open, the cruise engage switch is
bad, circuit #953 is open or the cruise enable wire is open. Repair the open or replace
the switch. Refer to section 10.7.16.
[b] If the resistance measurement is less than or equal to 5 , refer to section 10.7.2.
10.7.7
Check for Open or Miswired Brake Switch
Perform the following steps to check for an open or miswired brake switch:
1. Turn ignition OFF.
2. Disconnect the vehicle harness connector at the ECM.
3. Ensure the service brake is not engaged.
4. Measure resistance between the service brake cavity (i.e. G2) on the vehicle harness
connector and a good ground.
[a] If the resistance measurement is greater than 5 , or open, the brake switch is
miswired or faulty, circuit #953 is open or the ground is bad. Repair the open, rewire
or replace the switch. Refer to section 10.7.16.
[b] If the resistance measurement is less than or equal to 5 , refer to section 10.7.2.
10.7.8
Check for Short at the Brake Switch or Circuit
Perform the following steps to check for a short at the brake switch or circuit:
1. Turn ignition OFF.
2. Disconnect the vehicle harness connector at the ECM.
3. Engage the service brake.
4. Measure resistance between the service brake cavity (i.e. G2) on the vehicle harness
connector and a good ground.
[a] If the resistance measurement is less than or equal to 10,000 , the brake switch is
miswired or the service brake circuit is shorted to ground. Rewire, repair the short or
replace the switch. Refer to section 10.7.16.
[b] If the resistance measurement is greater than 10,000 , or open, refer to section 10.7.2.
10.7.9
Check for Open or Miswired Clutch Switch
Perform the following steps to check for an open or miswired clutch switch:
All information subject to change without notice.
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6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
