Checking the relay

Check that relay 2/29 is installed correctly. At the same time check the relay connections, in particular 2/29#2, for a short circuit to voltage supply as described in Short-circuit to supply voltage, intermittent faults .

Additional information: 

• To replace relay, see Central electronic module (CEM), replacing .
• To connect the test box, see Connecting the breakout box .

Fig 2: Breakout Box

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Fig 3: Identifying Voltage Display

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Fig 4: Identifying Relays

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Refer to Information