12
C
. Bench Style Seats-Adjustable for Distance to Steering Wheel
(Includes
Manufacturers Standard Production Seats
6. Supervisory Control Module Grounding
The Supervisory Control Module (SCM) case must be grounded to a good chassis
ground on the truck to ensure proper operation. Usually, a good ground path is
established from the SCM case through the mounting brackets and bolts to the chassis.
The ground effectiveness can be reduced over time due to corrosion, dirt, etc., leading to
electrostatic discharge problems.
The ground path should be checked, whenever the LectroCount³ is serviced. This
ensures that the SCM’s case remains properly grounded.
Checking for a good ground:
Resistance should be checked using a multi-meter. Testing should be done with all
accessories, including the dome light, turned OFF to prevent other currents from
distorting the measurement.
Measure the resistance between one of the silver hex head screws on the LectroCount³
mounting bracket and the ground terminal (
Pin 3
) on the power plug of the SCM.
(The ground terminal should be connected directly to the negative terminal of the battery
on a negative ground system.)
