Main fuse box 701 in the luggage compartment (REC)
| Main fuse box 701 in the luggage compartment (REC) |
| Location |
The main fuse box is placed in the luggage compartment on the left-hand wheel housing.
| Main function |
To be the main fuse box for the rear of the car and roof and to take care of specific parts of the logic for e.g. rear lighting.
| Type |
Main fuse box with relays, maxi and micro fuses and integrated control modules for logic functions. The wiring harness from the trailer coupling is connected to the main fuse box.
| Electrical connections |
The main fuse box is fed with +30 voltage from the engine compartment's main fuse box 342 and is ground at grounding points G3 and G29. The main fuse box is connected to the wiring harness via 7 connectors:
| 1. |
Body 1 (in the wiring diagram = B1)
to the main harness
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| 2. |
Body 2 (in the wiring diagram = B2)
to the main harness
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| 3. |
Body 3 (in the wiring diagram = B3)
to the main harness
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| 4. |
Head 1 (in the wiring diagram = H1)
to the roof harness
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| 5. |
Head 2 (in the wiring diagram = H2)
4D/5D to the roof harness CV to the main harness 
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| 6. |
Rear (in the wiring diagram = R)
to the rear harness
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| 7. |
Tail (in the wiring diagram = T)
4D: to the main harness 
5D: to the rear harness 
CV: to the rear harness 
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The connector for the main harness and rear harness consists of four sub-connectors, which are designated A, B, C and D, for example B1-B in the wiring diagram.
The contact TR-WH is used for the connection of the trailer contact. In some instance a special module needs to be connected to the TR-MOD socket.
The power circuits are distributed by the main fuse box:
Power supply +30, luggage compartment's main fuse box
Power supply +15, luggage compartment's main fuse box
| Fuses |
The main fuse box can be equipped with several fuses than those which have a function as set out in the list below. They are then not connected to the car's wiring harness in general.
| No. | Amp | Type | Function | Illustration | |||||||||
| 1 | Control module SPA (630) |
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| 2 | - | ||||||||||||
| 3 | - | ||||||||||||
| 4 | 40 | +30 | Electrically adjustable seat without memory Relay unit, seat (CV) Amplifier, loudspeaker (354) |
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| 5 | 40 | +30 | Electrically heated rear window (115) Control module, STC (CV) (565) Antenna amplifier (624) Control module Onstar |
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| 6 | 30 | +30 | Control module rear door, left (702RL) Control module, window lift, rear left (575RL) |
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| 7 | 30 | +30 | Control module, rear door, right (702RR) Control module, window lift, rear left (575RR) |
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| 8 | 20 | +30 | Connection, trailer (258) |
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| 9 | - | ||||||||||||
| 10 | 30 | High placed brake light Trailer lighting Luggage compartment lighting Rear lighting, left brake light Rear lighting, right: Direction indicators taillights reversing light |
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| 11 | 10 | +30 | Control module, all wheel drive (724) |
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| 12 | Control module SPA (630) |
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| 13 | - | ||||||||||||
| 14 | 15 | +30 | Rear window wiper motor (63R) Amplifier, loudspeaker (354) |
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| 15 | 15 | +30 | Electrically heated, left seat (64FL) |
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| 16 | 15 | +30 | Electrically heated, right seat (64FR) |
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| 17 | 7.5 | +15 |
Rain sensor (649)
Sunroof (182)
Interior rear view mirror (681) with:
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| 18 | 15 | +30 | Sunroof (182) |
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| 19 | - | ||||||||||||
| 20 | 7.5 | +30 | Radio receiver, satellite radio (349) Radio receiver, TMC (718) |
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| 21 | 7.5 | +30 | Control module, rear doors (702R) Control module, window lift, rear (575R) Control module, SPA (630) Front lamp unit interior lighting (185F) in CV |
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| 22 | 30 | +30 | Main unit radio/navigation (353/635) Amplifier (354SM), Bose® Centerpoint® Surround System |
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| 23 | 7.5 | +30 | Control module, TPMS |
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| 24 | 10 | +30 | Siren, anti-theft alarm (275) Control module, Onstar (673) Sensor, anti-theft alarm (690) |
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| 25 | 30 | +30 | Control module, electrically adjusted seat with memory, driver (357Dk) Electrically adjustable seat without memory (CV) |
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| 26 | 30 | - | Rear fog light License-plate light Luggage compartment lighting Trailer lighting Rear lighting, left Direction indicators taillights reversing light Rear lighting, right: brake light |
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| 27 | 10 | - | Electrically adjusted lumbar support |
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| 28 | - | - | |||||||||||
| 29 | - | ||||||||||||
| Relays |
The main fuse box can be equipped with several relays than those which have a function as set out in the list below. They are then not connected to the car's wiring harness in general.
| Location | No. | Designation | Illustration | Wiring diagram |
| R1 | 446 | Relay, electrically adjusted seat |
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LH RH |
| R2 | 757R | Relay, +15, REC |
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| R3 | - | |||
| R4 | 113 | Relay, electrically heated rear window |
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| R5 | 83a | Relay, rear window wiper |
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| R6 | - | |||
| R7 | 710 | Relay, motor, boot lid opening |
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| R8 | - | |||
| R9 | - | |||
| R10 | - | |||
| R11 | - |
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