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Rear electrical centre 701 (REC)

Rear electrical centre 701 (REC)

Location

The electrical centre is located in the luggage compartment on the left-hand wheel housing.

Main task

Act as the electrical centre for the rear of the car and the roof, and perform certain logic functions such as for the rear lighting.

Type

Electrical centre with relays, Maxi and micro fuses and an integrated control module for logic functions. Wiring for a trailer connector is connected to the electrical centre.


Connect

The electrical centre is fed with a +30 supply from the engine bay electrical centre (342) and grounded to grounding points G3 and G29. The electrical centre is connected to the wiring harness via 7 connectors:


1. Body 1 (in diagram = B1) to main wiring harness


2. Body 2 (in diagram = B2) to main wiring harness


3. Body 3 (in diagram = B3) to main wiring harness


4. Head 1 (in diagram = H1) to roof wiring harness


5. Head 2 (in diagram = H2)

4D/5D to roof harness

CV to main wiring harness


6. Rear (in diagram = R) to rear wiring harness


7. Tail (in diagram = T)

4D: to the main wiring harness


5D: to rear harness


CV: to rear harness



The connectors for the main and rear wiring harnesses each comprise four subconnectors, which are named A, B, C and D in the wiring diagrams, for example B1-B.

The TR-WH connector is used for a trailer connector. In some cases a special module, TR-MOD, is required.

The following current circuits are distributed by the electrical centre:

+30 power supply, rear electrical centre

+15 power supply, rear electrical centre

Fuses


The electrical centre can contain a greater number of fuses than those listed below. In such cases, these are not connected to a wiring harness.

No Amp Type Function Illustration
1 --
2 --
3 --
4 40 +30 Electrically adjustable seat without memory Relay unit, seat (CV)
5 40 +30 Electrically heated rear window (115) STC control module (CV) (565) Antenna amplifier (624)
6 30 +30 Control module, rear left door (702RL) Control module, rear left window lift (575RL)
7 30 +30 Control module, right rear door (702RR) Control module, rear left window lift (575RR)
8 20 +30 Connection, trailer (258)
9 --
10 30 High-level brake light Trailer lighting Luggage compartment illumination Left rear lighting brake lights Right rear lighting: Direction indicators taillights Reversing lights
11 10 +30 Control module, all-wheel drive (724)
12 --
13 --
14 15 +30 Rear window wiper motor (63R)
15 15 +30 Heating, left seat (64FL)
16 15 +30 Heating, right seat (64FR)
17 7.5 +15 Rain sensor (649) Sunroof (182) Interior rearview mirror (681) with:
- Remote control garage opening

- Compass

- ADM control module


18 15 +30 Sunroof (182)
19 --
20 7.5 +30 Radio receiver, satellite radio (349) Radio receiver, TMC (718)
21 7.5 +30 Control module, rear doors (702R) Control module, rear window lifts (575R) Control module, SPA (630) Front lamp unit, interior lighting (185F) on CV
22 30 +30 Head unit, radio/navigation (353/635) Amplifier (354SM), Bose® Centerpoint® Surround System
23 7.5 +30 Control module, TPMS
24 10 +30 Siren, anti-theft alarm (275) Control module, OnStar (673) Anti-theft alarm sensor (690)
25 30 +30 Electrically adjustable driver's seat with memory control module (357Dk) Electrically adjustable seat without memory (CV)
26 30 -- Rear fog light Number plate lighting Luggage compartment illumination Trailer lighting Left rear lighting Direction indicators taillights Reversing lights Right rear lighting: brake lights
27 10 -- Electrically controlled lumbar support
28 - -
29 --


Relays


The electrical centre can contain a greater number of relays than those listed below. In such cases, these are not connected to a wiring harness.

Location No Description Illustration Diagram
R1 446 Electrically adjustable seat relay LH RH
R2 757R Relay, +15, REC
R3 --
R4 113 Electrically heated rear window relay
R5 83a Rear window wiper relay
R6 --
R7 710 Boot lid opening motor relay
R8 --
R9 --
R10 --
R11 --