Maintenance; Wiring; Definitions - prime mover smx45 Master Service Manual

F-code Section
PT S5.0
Electrical Functions
Version no T-code
002 SMX
156
Return
C-code
5000

2. Maintenance

Connections must be kept clean and tight. The electrical
components should be protected from moisture. If the truck is
equipped with cold storage, or corrosive environment
application package, then the di-electric compound (part
number 302249-000) in the plug-in connectors should be
renewed periodically. This compound is available through the
parts department of your authorized Prime-Mover Dealer.

2.1. Wiring

Many electrical problems are caused by a bad or dirty battery.
Make sure battery is clean. Check the electrolyte level and
battery level.
CAUTION
Visually inspect all wiring and electrical components for the
following:
•
•
•
•
Use an ohmmeter to check for wiring continuity.

2.1.1. Definitions

Continuity. A continuous and uninterrupted path between
two or more locations in an electrical circuit, typically having a
resistance of less than 1 ohm.
Open Circuit. A lack of a continuous path between two or
more electrical connections. Generally, when such a circuit is
tested, it will have a resistance greater than one megohms.
Pulse Width Modulation. Pulse Width Modulation (PWM),
also called "chopping," controls the speed of the motor by
Master Service Manual
Unless otherwise
battery connector when checking electrical
circuits or components with an ohmmeter.
Electrical current
ohmmeter.
Loose connections or connectors
Loose or broken terminals
Damaged terminals, blocks, or strips
Broken wiring and
(especially those that are close to metal
edges or surfaces)
directed, disconnect
can damage the
shorted conditions
2006-12-12