G 1500 1/2 Ton Van V8-5.7L VIN R (1996)
8. If the audible P/B Booster Fluid Flow Alarm (School Bus only) is present whenever the Ignition Switch is START or whenever the parking brake
is engaged with the Ignition Switch in RUN, but there is no fluid flow or pressure problem, then In-Line Diode D202 has shorted. REPLACE
In-Line Diode D202.
9. If the Brake Indicator Lamp lights and the P/B Booster Fluid Flow Alarm sounds immediately whenever the brake is applied but the conditions
clear in a very short period of time, then REPLACE the P/B Booster Fluid Flow Delay Module.
10. If the P/B Booster Fluid Flow Alarm sounds whenever there is a low pressure condition even though fluid flow is not low, then REPLACE the P/B
Booster Fluid Flow Alarm Switch.
11. The following Diagnostic Tables are presented in tw0 forms: BASE and SCHOOL BUS.
12. CHECK the Park Brake Warning Switch for proper installation and contacting the lever with the Park Brake off.
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CHECK for a broken (or partially broken) wire inside the insulation which could cause system malfunction but prove GOOD in a
Continuity/Voltage check with a system disconnected. These Circuits may be intermittent or resistive when loaded and if possible, should be
checked by monitoring for a Voltage drop with the system operational (under load).
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CHECK for proper installation of aftermarket electronic equipment which may affect the integrity of other systems (Refer to "General
Troubleshooting Procedures,"). See: Diagrams/Diagnostic Aids
