Brake Warning Alarm Inoperative Low Fluid Pressure and Flow
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 |
Does the test lamp light? | -- | ||
2 |
Does the test lamp light? | -- | ||
3 | Repair the open in the BLK (150) wire between the P/B booster fluid flow alarm switch and ground G112 Does the alarm sound? | -- | System OK | -- |
4 | Replace the P/B booster fluid flow alarm switch. Does the alarm sound? | -- | System OK | -- |
5 |
Does the test lamp light? | -- | ||
6 |
Does the test lamp light? | -- | ||
7 | Repair the open in the DK GRN (860) wire between the P/B booster fluid pressure alarm switch and the P/B booster fluid flow alarm switch. Does the alarm sound? | -- | System OK | -- |
8 | Replace the P/B booster fluid pressure alarm switch. Does the alarm sound? | -- | System OK | -- |
9 |
Does the test lamp light? | -- | Go to Step 10 | |
10 | Replace the P/B booster fluid flow and pressure alarm delay module. Does the alarm sound? | -- | System OK | -- |
11 | Repair the open in the LT GRN (966) wire between the P/B booster fluid flow and pressure alarm delay module and the P/B booster fluid pressure alarm switch. Does the alarm sound? | -- | System OK | -- |
Brake Warning Alarm Inoperative Brake Warning Lamp OK
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 |
Does the test lamp light? | -- | ||
2 |
Does the ohmmeter display the correct resistance? | 1.5 Kohms | ||
3 | Is the RADIO-I fuse open? | -- | ||
4 | Is the resistance much greater than the specified value? | 1.5 Kohms | ||
5 | Is the resistance much less than the specified value? | 1.5 Kohms | -- | |
6 |
Does the test lamp light? | -- | ||
7 | Is there an open in the YEL (43) wire between connector C208 and in-line resistor R208? | -- | ||
8 | Replace the shorted in-line resistor R208. Is the alarm operative? | -- | System OK | -- |
9 | Connect a self-powered test lamp between P/B booster fluid flow and pressure alarm delay module connector cavity E and P/B booster fluid flow alarm connector cavity A for the YEL/BLK (965) wire. Does the test lamp light? | -- | ||
10 | Locate and repair the open in the YEL (43) wire between in-line resistor R208 and the P/B booster fluid flow alarm. Is the alarm operative? | -- | System OK | -- |
11 | Replace the P/B booster fluid flow alarm. Is the alarm operative? | -- | System OK | -- |
12 | Locate and repair the open in the YEL/BLK (965) wire between the P/B booster fluid flow and pressure alarm delay module and the P/B booster fluid flow alarm. Is the alarm operative? | -- | System OK | -- |
13 | Replace the RADIO-I fuse. Is the alarm operative? | -- | System OK | -- |
14 | Repair the open in the YEL (43) wire between the APE fuse block and connector C208. Is the alarm operative? | -- | System OK | -- |
15 | Repair the open in the YEL (43) wire between connector C208 and in-line register R208. Is the alarm operative? | -- | System OK | -- |
16 | Is there an open in the YEL/BLK (965) wire between in-line resistor R208 and the P/B booster fluid flow and pressure delay module? | -- | -- | |
17 | Locate and repair the open in the YEL/BLK (965) wire between in-line resistor R208 and the P/B booster fluid flow and pressure delay module. Is the alarm operative? | -- | System OK | |
18 | If no open is found in the wire, replace the open resistor R208. Is the alarm operative? | -- | System OK | -- |
