Ventrac 3400Y - TCM (Tractor Control Module) Explanation; Replacing Fuses (Power Relay Module); Replacing Fuses (Front Fuse Panel)

SERVICE
Service - 46
7. Connect the negative (-) booster cable to the
booster battery’s negative (-) terminal (3).
8. Connect the other end of the negative (-) booster
cable to the disabled power unit’s ground stud (4).
9. Start the disabled power unit and remove the
booster cables in reverse order of installation
(negative booster cable rst).
TCM (Tractor Control Module) Explanation
A
The Tractor Control Module (A) is a sealed computer-
ized device designed to control the electronic safety
related functions of this tractor. Both solid state and
mechanical components are used to assure safe,
reliable operation of this machine.
This TCM monitors the electronic circuits necessary
for the engine, starter, and PTO to function. These
“input” circuits include the PTO Switch, Neutral Switch,
Parking Brake Switch, Key Switch, Seat Switch, and
Generator Presence. The TCM is programmed to
allow the engine, starter, or PTO to operate only when
specic input criteria are satised. The engine, start,
and PTO are controlled by “outputs” from the TCM.
For additional information, refer to the TCM section
of the troubleshooting guide.
Replacing Fuses (Power Relay Module)
1. Park the power unit on a level surface.
2. Engage the parking brake and shut o󰀨 the engine.
3. Remove the key from the ignition switch.
4. Turn the battery disconnect switch to the O󰀨
position.
A
B
5. Open the left hood
panel.
6. Remove the sealed
fuse cap from the
power relay module.
7. Identify and pull the
defective fuse from the
socket.
8.
Power Relay module (J-Case Fuse)
Position Fuse Circuit
Top (A) 50 amp Rear Fuse Panel Supply
Bottom (B) 50 amp Key Switch, TCM
Insert a new fuse into the socket. Be certain to
use the correct amperage fuse or damage may
occur to the power unit.
9. Reinstall the sealed fuse cap and close the left
hood panel.
10. Turn the battery disconnect switch to the On
position.
Replacing Fuses (Front Fuse Panel)
1. Park the power unit on a level surface.
2. Engage the parking brake and shut o󰀨 the engine.
3. Remove the key from the ignition switch.
4. Turn the battery disconnect switch to the O󰀨
position.
A
5. Tilt the seat forward and
remove the front canvas.
6. Remove the sealed cover
(A) from the fuse panel.
Front Fuse Panel (Mini Fuse)
Position Fuse Circuit
1 15 amp PTO
2 5 amp Gauges & Alarm
3 5 amp Seat Switch
4 15 amp Head / Tail Lights
5* 20 amp 12v Rear
6* 15 amp Work / Strobe Lights
7* 10 amp Back-up / Horn / Directional
8* 15 amp 12v Front Relays
9* 5 amp 12v Front Controls
10* 10 amp Hydraulic Auxiliary
*Optional accessory.
7. Identify and pull the defec-
tive fuse from the socket.