Audi 80 Quiz
Body Electrical System

Replacing the Central Junction Box

In this manual: Body Electrical System
Technical Description — 39Engines — 41Exhaust System — 13Cooling System — 28Fuel tank and fuel pump — 12Air Filter and Intake Ducts — 13Mono-Motronic Injection System — 18Digifant Injection System — 19KE-III-Jetronic Injection System — 35MPI and MPFI Injection Systems — 32Clutch — 11Transmission and Driveline — 21Suspension and Steering — 33Brake System — 41Anti-lock brake system — 8Wheels and Tires — 13Body Electrical System — 35Ignition System — 24Lighting — 14Signaling Devices — 7Instruments and Auxiliary Equipment — 54Heating and Ventilation — 7Body Components — 18Troubleshooting — 6Specifications — 13
~1min read

If troubleshooting shows that the cable routing, the corresponding fuse, or the relay are undamaged, the cause of the fault may be the central junction box. Typical faults are loose contacts or temperature-related failures. In this case, the central junction box must be replaced.


PROCEDURE

Be sure to obtain the correct version of the central junction box as the replacement part.

Open the cover and disconnect the hinges.

Press the retaining clips on the right and left of the insert element – the central junction box proper – and pull out the insert element with the connected wires.

Transfer the connectors one by one from the old unit to the new unit.

Reinstall the insert element into the frame.

Remove the shelf on the left under the instrument panel and check that all wires have been transferred.

Note: the central junction box cover must be closed, otherwise drafts will blow onto the driver's legs while driving.

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A quick Audi 80 quiz: every answer comes with an explanation and a link to the manual page.