Buell 2002 S3T - Page 441

7-52 2002 Buell S3T: Electrical
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Speedometer Test: Chart 2A
INOPERATIVE, INACCURATE OR ERRATIC SPEEDOMETER
YES
Hook up speedometer tester.
See TESTING. Verify that
tester battery is OK.
NO
Remove speedometer back
cover. Check speedometer
bulb. Bulb failed?
NO
If speedometer backlighting is
not on, check for 9-12 VDC
on O/W wire at terminal on
back of speedometer.
Voltage present?
YES
Replace
bulb.
Perform speed sweep function and specified
inputs with tester and observe output speed
and odometer/trip odometer change on
speedometer.
Does speedometer appear to function
normally and follow sweeping
frequency input?
NO
Check 3-pin vehicle speed
connector and wires for
damage. Connector or wire
damage found?
YES
Program steady input
frequency on tester and
observe output speed on
speedometer while
moving/shaking vehicle
harness connections.
Output erratic?
YES
Repair as
necessary.
NO
Replace
speedometer.
NO
Bad connection
found. Repair con-
nector or harness.
DIAGNOSTIC NOTES
● Low battery voltage on speedometer tester
may cause inaccurate test results. Make
sure speedometer tester battery is fully
charged.
● If necessary, remove speedometer sensor
and check for accumulation of debris. If
debris is not present, replace sensor. If
debris is present, clean sensor and repeat
test. Replace if necessary.
NOYES
Locate and repair
open in O/W wire.
Check for continuity to
ground on BK wire at terminal
on back of speedometer.
Continuity present?
NOYES
Locate and repair
open in O/W wire.
Replace bulb
YES
Go to
Speedometer Test:
Chart 2B.
STOP
6008
6014
600860066004
6008
6014
Problem #2: Speedometer inoperative, reading high/low,
or needle sticking/intermittent/erratic.
Check Accessory Fuse. Fuse OK? No, replace Fuse.
Yes, Turn ignition ON. Is speedometer backlighting on?