Vehicles 638.0/1/2 until 11/15/1997 V.
Removing
1. Disconnect the negative cable from the battery.
2. Remove the heater with the bracket.
3. Remove bolts 1 (see fig. 10.3a).
Pic. 10.3a. Additional heater control unit (cars 638.0/1/2 until 11/15/1997):
1. Bolts,
2. Protective cover,
3. Base plate,
A72. Control block,
A72.1. Control unit wiring connector.
4. Remove protective cover 2.
5. Disconnect the wiring connector A72.1.
6. Disconnect base plate 3 with control unit A72.
Installation
7. Installation is made in an order, the return to removal.
Vehicles 638.0/1/2 from 10/13/1997
Removing
8. Disconnect the negative cable from the battery.
9. Remove the heater.
10. Turn off bolts of fastening of the block of management.
11. Remove the control unit 1 of the heater 2 as far as the electrical wires 3 allow (see fig. 10.3 b). Disconnect the wiring connector from the control unit.
Pic. 10.3 b. Additional heater control unit (vehicles 638.0/1/2 from 10/13/1997):
1, control box,
2. Heater,
3. Electrical connector.
12. Remove the heater control unit 1.
Installation
13. Installation is made in an order, the return to removal.