Unit Description
30
NOTE: Fuse F4 must be in place for Prestolite alternators to
charge. Fuse F4 must be removed for Bosch and Thermo
King alternators. Service Parts Base Controllers are shipped
without the F4 fuse
NOTE: The F5 preheat fuse is a “slow blow” type fuse. It is
designed for use with the Yanmar trailer engine air
pre-heater. Always replace the fuse with the TK specified
fuse.
Fuse
Size
Function
F1
5A
2A Power for REB
F2
15A
On/Off Switch Circuit
F3
40A
Fuel Solenoid/Starter Circuit
F4
None
2A
No Fuse - All Bosch and Thermo King
Alternators
(Note 1)
2A Fuse - All Prestolite Alternators
F5
60A
Preheat Circuit
(Note 2)
F6
15A
High Speed Solenoid Circuit
F7
2A
8X Power for CAN bus
F8
5A
2A Power for CAN bus J12
F10
15A
On/Off Relay Circuit
F12
5A
2A Power for CAN bus J13
F13
2A
Status Light Circuit
F15
2A
SR-4 Power Supply Circuit
F20
2A
Alternator Sense Circuit
F25
10A
Fresh Air Door Circuit
F25
7.5A
High Pressure Cutout Circuit