|
|
11 Relay ,main switch power supply Relay G 367 is a bi-stable relay .I fone of the two coils is briefly energised, the relay will remain in this position. If the other coil is energised, the relay will switch over and then remain in the new position. Electrically closing the main switch The m ain switch (D924) can be closed: - electrically in the cab using switch C 853 - elect rically on th e chassis using swit ch C854 E501126 A TTENTION: Switches C853 and C 854 are connected in series. When C853 or C854 is switched on, the o ther switch must be in the “main switch on” position. Switch C853 (main switch in cab) connects the C 1 and C2 connections to the C 4 and C5 connections via w ire 4176, contacts 5-7 of switch C853, wire 4177, contacts 1-2 of switch C854 and wire 4178. Relay G 367 is immediately energised through wire 4174 and connection point A3 (A3 is connected to earth in the unit for 0.5 seconds). This connects point 88a to 88 of relay G 367. The positive terminal of the batteries is now connected to the vehicle’ s power supply . Immediately after switch C 853 closes, connection point C2 is internally connected to point A7. Connection point A5 is connected to the positive terminal via w ire 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 and C2 connections to the C 4 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. Relay G 367 is immediately energised through wire 4174 and connection point A3 (A3 is connected to earth in the unit for 0.5 seconds). This connects point 88a to 88 of relay G 367. The positive terminal of the batteries is now connected to the vehicle’ s power supply . Immediately after switch C 854 closes, connection point C2 is internally connected to point A7. Connection point A5 is connected to the positive terminal via w ire 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 using switch C 853 - elect rically on th e chassis using swit ch C854 Opening the main switch electrically in the cab E501126 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 the C 1 and C2 connections from the C 4 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. 200520 2-29 Changes in the electrical system from chassis number 0E626381 5 CHANGES IN THE ELECTRICAL SYSTEM CF65/75/85 series ≥0E621376 |