Tennant ATLV 4300 Service Manual page 97

First check to make sure :
1. Battery is charged.
2. Engine runs good.
Check to see that the head lift mechanism has not been damaged or prevented from traveling its normal range of movement.
With the key switch in the on position, check for battery
voltage between the 3/BLU wire at the CB- -1 circuit breaker
and any 13/BLK wire.
no
battery
battery
voltage
voltage
Check wiring of 3/BLU wires
between CB- -1 and the head
lift switch and repair
Replace CB- -1
circuit breaker
ok
ATLV 4300 330495 (10- -98)
HEAD LIFT WILL NOT OPERATE
Vacuum head lift does not operate
yes
Does the engine
no
run ?
no
battery
voltage
Replace the head
ok
lift switch
ok
Head lift operates correctly
This troubleshooting guide deals primarily
with the optional head lift motorized linear
actuator
yes
With the engine NOT running and the key switch in the
on position, check for battery voltage between
wires, and any 13/BLK wire.
battery
voltage
With the key switch in the on position and the engine NOT
running , hold the head lift switch in the raise position while
measuring for battery voltage between both 21/Brn and 22/
YEL wires to any 13/BLK wire.
no
battery
battery
voltage
voltage
With the key switch in the on position
and the engine NOT running , hold
no
the head lift switch in the lower position
battery
while measuring for battery voltage
voltage
between both 21/Brn and 22/YEL wires
to any 13/BLK wire.
ok Replace the head lift actuator.
ELECTRICAL
both 3/BLU
battery
voltage
4-29