Stop Lamps Inoperative - One P72
Circuit Description
Voltage is supplied at all times through the STOP-HAZ fuse to the stoplight switch. When the brake pedal is depressed, the contacts in the stoplight switch close. Voltage is supplied through the turn signal/hazard switch to the LH and RH stoplights, and the stoplights go on. If a turn signal is on, the stoplight on that side will flash as a turn signal. The other stoplight will serve only as a stoplight.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 |
Are the stoplamps on? | -- | System OK | Go to Step 2 |
2 | Probe the ORN (140) wire at the headlamp switch connector with a test lamp. Does the test lamp illuminate? | -- | Go to Step 3 | Go to Step 4 |
3 |
Does the test lamp illuminate? | -- | Go to Step 5 | Go to Step 6 |
4 | Locate and repair the open circuit in the ORN (140) wire between the stoplamp switch connector and the fuse block. Is the repair complete? | -- | Go to Step 1 | -- |
5 |
Does the test lamp illuminate? | -- | Go to Step 7 | Go to Step 8 |
6 | Replace the stoplamp switch. Is the repair complete? | -- | Go to Step 1 | -- |
7 | Probe the YEL (18) or DK GRN (19) wire at the turn signal/hazard switch connector. Does the lamp illuminate? | -- | Go to Step 9 | Go to Step 11 |
8 | Locate and repair the open circuit in the BRN (9) wire between the headlamp switch and C200. Is the repair complete? | -- | Go to Step 1 | -- |
9 | Check the condition of connectors C204 and C205. Are the connectors OK? | -- | Go to Step 12 | Go to Step 10 |
10 | Repair or replace connectors C204 and C205. Is the repair complete? | -- | Go to Step 1 | -- |
11 | Replace the turn signal/hazard lamp switch. Is the repair complete? | -- | Go to Step 1 | -- |
12 | Refer to the coach manufacturer's repair manual in order to diagnose and repair the system. Is the repair complete? | -- | System OK | -- |
Stop Lamps Inoperative - One P92
Circuit Description
Voltage is supplied at all times through a circuit breaker to the stoplight switch. When the brake pedal is depressed, the contacts in the stoplight switch close. Voltage is supplied through the turn signal/hazard switch to the LH and RH stoplight, and the stoplights go on. If a turn signal is on, the stoplight on that side will flash as a turn signal. The other stoplight will serve only as a stoplight.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 |
Are the stoplamps on? | -- | System OK | Go to Step 2 |
2 | Probe the RED (27A) wire at the headlamp switch connector with a test lamp. Does the test lamp illuminate? | -- | Go to Step 3 | Go to Step 4 |
3 |
Does the test lamp illuminate? | -- | Go to Step 5 | Go to Step 6 |
4 | Locate and repair the open circuit in the WHT (293) wire between the stoplamp switch connector and the fuse block. Is the repair complete? | -- | Go to Step 1 | -- |
5 |
Does the test lamp illuminate? | -- | Go to Step 7 | Go to Step 8 |
6 | Replace the stoplamp switch. Is the repair complete? | -- | Go to Step 1 | -- |
7 |
Does the lamp illuminate? | -- | Go to Step 9 | Go to Step 11 |
8 | Locate and repair the open circuit in the WHT (293) wire between the headlamp switch and C200. Is the repair complete? | -- | Go to Step 1 | -- |
9 | Check the condition of connectors C205 and C400. Are the connectors OK? | -- | Go to Step 12 | Go to Step 10 |
10 | Repair or replace connectors C205 and C400. is the repair complete? | -- | Go to Step 1 | -- |
11 | Replace the turn signal/hazard lamp switch. Is the repair complete? | -- | Go to Step 1 | -- |
12 | Refer to the coach manufacturer's repair manual in order to diagnose and repair the system. is the repair complete? | -- | System OK | -- |
