4-74 2007 Buell Firebolt: Fuel System
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TROUBLE CODE 33 4.24
GENERAL
Fuel Pump
The fuel pump assembly is shown in Figure 4-52. ECM Pin 3
provides ground to the fuel pump. Code 33 will set if:
● BN/Y wire is shorted to 12 volts. This will also cause the
ignition fuse to blow. See Figure 4-39.
● BN/Y wire is shorted to ground. This will cause the fuel
pump to run continuously even when the motor is not
running.
● Fuel pump motor stalls or spins without providing fuel
pressure.
DIAGNOSTICS
Diagnostic Notes
The reference numbers below correlate with the circled num-
bers on the Code 33 flow chart.
1. Connect BREAKOUT BOX (Part No. HD-42682) to ECM.
See 4.6 BREAKOUT BOX.
2. Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404), red pin probe and patch cord.
3. Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404), gray socket probe and patch cord.
Figure 4-52. Fuel Pump Assembly
10932b
3
4
2
1. Low fuel level sensor
2. Pressure regulator
3. Wiring harness
4. Fuel screen
1
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