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10 The m ain switch (D924) can be closed: - electrically in the cab - elect rically on th e chassis Closing the main switch electrically in the cab E501099 NOTE: S witch C 854 must be in the “main switch on” position (connection b etween contacts 1 and 2). Switch C853 (switch for main switch in cab) connects the C 1 and C2 connections to the C4 and C5 connections via w ire 4176, contacts 5 - 7 of switch C 853, wire 4177, contacts 1 - 2 of switch C 854 and wire 4178. Relays G367 and G368 are immediately energised through wire 4174 and connection point A3 (A3 is connected to earth for 0.5 seconds). This closes the connection between points 88a and 88 of both relay G367 and relay G 368. The positive and the negative poles of the batteries are now connected to the vehicle’ s power supply . Immediately after switch C 853 closes, connection point A2 is internally connected to point A7. Connection point A5 is connected to the positive pole via wire 3173 after connection point 88 of relay G 367. This connection transmits a signal to the E CU to indicate that relay G 367 has switched. Closing the main switch electrically on the chassis NOTE: S witch C 853 must be in the “main switch on” position (connection b etween contacts 5 and 7). Switch C854 (switch for main switch on the chassis) connects the C 1 connection to the C4 and C5 connections via w ire 4176, contacts 5 - 7 of switch C 853, wire 4177, contacts 1 - 2 of switch C 854 and wire 4178. Relays G367 and G368 are immediately energised through wire 4174 and connection point A3 (A3 is connected to earth for 0.5 seconds). This closes the connection between points 88a and 88 of both relay G367 and relay G 368. The positive and the negative poles of the batteries are now connected to the vehicle’ s power supply . Immediately after switch C 854 closes, connection point A2 is internally connected to point A7. Connection point A5 is connected to the positive pole via wire 3173 after connection point 88 of relay G 367. This connection transmits a signal to the E CU to indicate that relay G 367 has switched. The m ain switch (D924) can be opened: - electrically in the cab - elect rically on th e chassis Opening the main switch electrically in the cab E501099 NOTE: S witch C 854 must be in the “main switch on” position (connection b etween contacts 1 and 2). Switch C853 (switch for main switch in cab) disconnects wire 4176, contacts 5 - 7 of switch C853, wire 4177, contacts 1 - 2 of switch C854 and the C 1 and C2 connections from the C 4 and C5 connections via w ire 4178. 200404 2-40 5 ELECTRICAL SYSTEM Electrical system CF65/75/85 series ≥0E621376 |