Troubleshooting Cable Harness - Kalmar DRF420-60S5 Maintenance Manual

Table of Contents

0 Complete machine – Complete machine

Troubleshooting cable harness

Perform troubleshooting for all cables in the same way to avoid

damage to control units, components or measuring equipment.

1 Study the circuit diagram in question, check where the suspect-

2 Turn off the main electric power with the battery disconnector.

3 Unplug the connector at the control unit or component in ques-

4 Check if there is open circuit.

5 Check if there is short circuit to frame:

Maintenance manual DRF 400–450

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ed cable is connected and if, and if so where, it is spliced.

Some components cannot be checked without power sup-

ply to the component. In such an event, proceed to point 5.

Measure resistance between connections for the compo-

nent in the connector at the control unit or component.

b. The resistance must correspond with the component. Oth-

erwise there may be an open circuit or short circuit in cable

harness and/or component.

Unplug the connector both at the control unit and compo-

nent in question.

b. Measure the resistance of one lead at a time. Measure be-

tween the lead and a frame-connected part of the ma-

The multimeter should show endless resistance.

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