Introduction To The Power Distribution Module (Pdm); Electrical Schematics - Yale A7S1 Service Manual

8000 YRM 2199
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INTRODUCTION TO THE POWER
DISTRIBUTION MODULE (PDM)
NOTE: Three spare fuses are located within the PDM.
The PDM is made up of flasher, fuses, and other
electrical components. It functions as the forklift truck
engine starting control, and protection circuit. It
contains the relays and fuses, making the vehicle
circuit maintenance more convenient. The see
Figure 76 and/or Figure 77 for the ordinary and
expanded PDM.
Application and function requirements of PDM:
Description
indicates the temperature of the
engine
indicates the remaining fuel of
gasoline or diesel
Excessive Transmission
Temperature Indicator
neutral gear light
Issue with Air Filter
indicate the oil temperature of the
transmission
The key controls the function of the main power
supply, such as the starting function, preheating
function, flasher, time relay, main power relay, starting
relay, headlamp relay, preheating relay, and various
other functions.

ELECTRICAL SCHEMATICS

The schematic drawing of different engines differ from
each other mainly on the starting system and on the
sensor. It is suggested to refer to the specific drawing
and real condition of the truck first when carrying out
repair.
Electrical System
Function
Shows the temperature of the
transmission oil when it exceeds a
certain threshold
Monitor Air Flow Restriction
shows the temperature of the
transmission oil only
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