Diagnostics - Buell 2008 XB SERIES Electrical Diagnostics Manual

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1 2
1. Fuel pressure gauge adapter (B-45522)
2. Fuel valve (closed position)
3. Air bleed tube
4. Fuel pressure gauge (HD-41182)
5. Air bleed petcock
Figure 2-40. Fuel Pressure Gauge (Part No. HD-41182)
em01193
Right Handlebar
Switch
W/BK
GY
Fuel Pump
1 1
BK
2 2
Y/R
3 3 O/GY
4 4
BN/Y
[86B] [86A]
Instrument Module
[39A]
[39B]
Low fuel
15 15
Y/R
lamp
[11A]
ECM
J1
[11A]
(GY)
J2
System ground # 4
[10A]
Switched ignition
(BK)
System ground # 3
System ground # 2
Fuel pump output
Fuel pump output
System ground # 1
[10A]
2-44 2008 Buell XB Diagnostics: Engine Management
4
5
3
[22B] [22A]
3 3
W/BK
4 4 R/BK
[11B]
8 8
BK
GY
9 9
BK
16 16
24 24 BK
27 27 BN/Y
27 27
BN/Y
33 33 BK
[10B]
Figure 2-41. Fuel Pump Circuit (Ulysses, Lightning)

DIAGNOSTICS

PART NUMBER
B-48115 BREAKOUT BOX
HD-41404-B HARNESS CONNECTOR TEST KIT
Diagnostic Notes
Each reference number below correlates to a circled number
on the flow chart(s).
1. Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), purple socket probe and patch cord.
2. Connect BREAKOUT BOX (Part No. B-48115) to ECM.
See 2.6 BREAKOUT BOX
3. If resistance greater than 1 ohm is found between ECM
connector [10] terminal "27" OR "28" and Fuel Pump
connector [86A] terminal "4", but not both, the open must
be repaired but this repair will not correct the concern.
[33B] [33A]
LOCK
4 4
R R
R/BK 3 3 R/BK
2 2
R/GY
R R
1 1
From
battery
TOOL NAME
Ignition
Switch
R 44
Key
R/Y 41
Switch
Battery
Fuse
Fuse
35
R
38
R
33
O/GY
Fuel
Pump
Fuse
R 39
R 27
Ignition
Fuse
GY/O
21
Ignition
W/BK
1 86
Relay
9 85
BK
5 30
GY/O
87A
GY 4 87