Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 38
4.3.3 Battery (-) Connection
The ECM requires Three un-switched battery negative inputs; the inputs
should be permanently connected to the machine battery and all inputs must
be used to ensure the ECM is supplied with an adequate connection to
ground. Failure to use all three inputs could result in intermittent
communication and or driver operation.
The ECM negative inputs must be connected back to the main batt – terminal
on the application batteries and not through application chassis. The
consistent quality of the ground path cannot be guaranteed when grounding
the negative return through the chassis, which may cause intermittent system
failures and excessive noise levels on the ECM supply circuit. Perkins will not
approve installations, which do not meet this requirement. Section 4.3.4
shows the correct method of supplying both power and ground connections to
the ECM.
Battery Connection – Do Not supply power to the ECM from the starter
motor connections