Circuit Description
The Low Air Indicator illuminates when ground is applied to the Low Air Indicator Control Circuit.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Brake Warning System Schematics | |||
1 | Did you review the Brake Warning System Description and Operation and perform the necessary inspections? | Go to Step 2 | |
2 | Verify a fault is present. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Is the low air indicator and the Low Air Pressure Warning Alarm inoperative? | Go to Step 4 | Go to Step 6 |
4 |
Does the low air indicator illuminate? | Go to Step 12 | Go to Step 5 |
5 | Connect the fused jumper wire from the low air indicator control circuit to a good ground . Does the low air indicator illuminate? | Go to Step 10 | Go to Step 9 |
6 |
Does the test lamp light? | Go to Step 7 | Go to Step 11 |
7 | Test the low air indicator control circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 8 |
8 | Replace the Instrument Panel Cluster. Did you complete the replacement? | Go to Step 13 | -- |
9 | Repair the open in the low air indicator control circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 13 | -- |
10 | Repair the open in the ground circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 13 | -- |
11 | Repair the open in the Battery Positive Voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 13 | -- |
12 | Replace the Low Air Pressure switch. Refer to Low Air Pressure Switch Replacement . Did you complete the replacement? | Go to Step 13 | -- |
13 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
