THIEMAN Tailgates M16, Руководство пользователя и список запчастей

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21.
tRoublEshooting guidE
M16/20Et
test Equipment: 1. 0-5000 psi pressure gauge
2. DC voltmeter/ohm meter
3. DC amp meter
4. standard mechanics tools
Note: Please refer to the electrical diagrams and hose connection drawings in the liftgate’s
owners manual when troubleshooting. This guide is only for standard Thieman liftgates.
Special liftgates with options other than those in the owner’s manual will require special
diagrams for troubleshooting. Read and understand this entire guide completely before doing
any troubleshooting. Certain listed problems may be related to other problems listed so a
comprehensive knowledge is required before proceeding.
Problem – Pump motor will not run in the raise mode
Causes – a. Tripped circuit breaker
b. Blown 20A fuse
c. Defective or undercharged battery(ies)
d. Improper battery cable connection or improper ground connection
e. Defective or improperly wired raise switch
f. Defective or improperly wired solenoid start switch
g. Defective pump motor
Corrections – a. Reset the circuit breaker located within 2ft of the liftgate supply
battery(ies).
b. Replace 20A fuse.
c. The “at rest” voltage for the batteries without the engine running and
under no load should be at least 12.5V. The minimum voltage between
the motor stud and ground is 9V at maximum load conditions. If proper
voltage is not present, charge or replace the batteries. The battery(ies) on
the vehicle should be that which has a minimum 150 amp reserve
capacity.
d. Trace battery and ground cable connections to locate improper
connection(s). Make sure the ground cable is installed going from the
aluminum pump base to bare metal on the truck frame. Make sure the
ground cable from the batteries to the frame is a heavy 2ga. cable and
that it too is connected to bare metal on the frame. Make sure there is
12.5V present at the large terminal on the motor start solenoid where the
2ga. cable from the batteries is connected. Replace any damaged cables
and repair any bad connections.
e. Check for voltage on the black wire at the control switch. If no voltage is
present the black wire from the motor start solenoid is loose or broken
and needs repaired. If voltage is present then check for voltage at the
green and white wire on the switch with the switch in the “RAISE”
position. If no voltage is present, replace the switch.
f. Check for voltage on the white wire at the motor start switch when the
switch is activated. If no voltage exists the white wire is loose or broken
between the switch and the motor start solenoid. Check that the purple
ground wire on the start solenoid is connected properly and there are no
bad connections. If there is voltage on the white wire and the coil does
not energize or if there is no voltage present at the motor terminal then
replace the start switch.