Fuse Block: Description and Operation

Main Fuse Boxes
Cars with diesel engines have three main fuse boxes while cars with petrol engines have four. The three main fuses boxes are connected to the wiring harness via connectors while the extra main fuse box for petrol engines is integrated in the wiring harness.

The main fuse boxes contain all of the vehicle's fuses and relays except fuel pump relay 102. This relay is mounted in the cabin under the right A-pillar.

The Engine Bay Contains
- Electrical centre 342 (UEC)

- Main fuse box, Trionic T8, 727
Electrical Distribution Unit 727 In The Engine Bay

Main fuse box 342 contains relays, maxi and microfuses as well as a control module with logic functions for the front section of the car.

Main fuse box 727 contains relays, as well as maxi and microfuses for engine management system T8.

Fuse holder 746 contains a maxi fuse for electro-hydraulic power steering.

ALLDATA Editor Note: The wiring for the electro-hydraulic power steering shows that is is part of the Simtec engine management system used on the 1.8L engine vehicles. These vehicles are not imported into the United States.

The Dashboard Contains
- Electrical centre 22 (IPEC)
Instrument Panel Electrical Centre 22 (IPEC)

Main fuse box 22 contains relays as well as maxi and microfuses for functions in the cabin and the dashboard.

The BCM control module is mounted on the main fuse box.

The Luggage Compartment Contains
- Electrical centre 701 (REC)
Rear Electrical Centre 701 (REC)

Main fuse box 701 contains relays, maxi and microfuses as well as a control module with logic functions for the rear section of the car.