Multi Pro 1750
Page 5 − 5
Electrical System
Traction Speed Sensor Test Harness
NOTE: Based on harness length, speed sensor testing
can be performed while driving machine in an open area
or while the machine is stationary. Stationary testing re-
quires an assistant and using jack stands to get the rear
wheels off the ground.
Special Tools Needed
Traction speed sensor test harness (fabricated using
the information provided here)
Multimeter with frequency measurement capability
(12V square wave)
Instructions
1. Park machine on a level surface, stop engine and en-
gage parking brake. Remove key from ignition switch.
2. Disconnect sensor from wire harness and check wire
harness for circuit problems before testing speed sen-
sor (see Traction Speed Sensor in the Component Test-
ing section of this chapter).
3. With sensor installed in transaxle, connect traction
speed sensor test harness between sensor and ma-
chine harness.
4. Plug blue wire (red test harness connector) into the
positive voltage port on the multimeter and black wire
(black test harness connector) into ground port on the
multimeter.
5. Set multimeter to measure frequency (12V square
wave).
6. Start and drive machine while watching the meter.
The frequency should increase when vehicle speed in-
creases if the sensor is functioning appropriately.
7. If frequency is not registered, is erratic, or does not
increase when increasing speed, remove and replace
the speed sensor. See Traction Speed Sensor in the
Service and Repairs section of this chapter.
Figure 6
Traction Speed Sensor Test Harness
TO SPEED SENSOR
PAKARD 12110293
FEMALE CONNECTOR
NEGATIVE (−)
CONNEECTORS COMPATIBLE WITH
MULTIMETER USED
POSITIVE (+)
14 ft (4.27 m)
TO SAFELY REACH
OPERATOR SEAT
TO MACHINE HARNESS
PAKARD 12129615
MALE CONNECTOR
BU
BK
BU
BK
R
BU
BK
R
To Next Page
Loading...
Need help?
General
