American Landmaster 36V 200 Series, Service Manual

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15312 200 Series 36V
Section 9 - T
ROUBLESHOOTING
FLOWCHART
Follow the steps below to quickly diagnose common issues. For detailed testing
information, see Procedures below. It is strongly recommended to first check all
wiring connections and terminals to ensure that they are securely attached. Loose
connections are the most common cause for electrical issues.
Issue Test Item If Fail
Vehicle does not
move when
throttle depressed
Turn Key Switch ON
Having the throttle
depressed while
shifting from “F” to
“R” or visa-versa will
generate a fault.
Reset Key Switch to
resolve the fault.
Battery Gauge turns ON 
Check Main Fuse

Check 12V circuit Fuse

Check Yellow Body connector

Check for >12V at Key Switch Red and
Black on harness side
Relay “clicks” once 
Check connections at Relay

Ensure 12V at Black wire when key ON
>36V at Orange Contactor
wires

Touch Pre-charge Resistor. If hot,
controller is bad. Disconnect Main
Fuse.

Check 36V circuit Fuse

Check for >36V at Purple wires at
Motor Controller

Check condition or all other connections
at controller
Turn Key Switch OFF
Throttle Switch continuity to
Ground with Throttle
depressed (white wire at
controller)

Check connections at Throttle Switch
Throttle Sensor resistance
normally below 120Ω (Gray
to Gray/Black wires at
controller)

Check that Throttle Pedal has fully
returned

Inspect Throttle sensor closely for
cracks
Throttle Sensor resistance
above 4300Ω when Throttle
depressed (Gray to
Gray/Black wires at
controller)

Check condition of connections at
Throttle Sensor

Check connection to harness