Minus connects to ground The supply of current to the consumer is carried out by a wire, which, in a more or less complicated way, can always be traced to the battery, as can be seen...
Wire connections For a long time in the ADAC accident statistics, loose wire connections were mentioned as the most common cause of accidents - and this was the case for all...
Support for additional relays For relays and control units that are not located in the central switching unit, the Audi A4 also has so-called additional relay supports under the dashboard:...
Electronics box The cover of the electronics box is fixed with five hex bolts (arrows). One of the bolts must be unscrewed through a hole in the cover under the windshield....
Relays and control units The on-board electrical equipment includes a number of relays and control units, which are placed in a protective box on the left under the dashboard or under...
Switching relay Switching relay function 1. When a certain consumer is switched on in the switching relay «switching current», arriving at terminal 86, closes the electrical...
X-contact unload relay Unload relay (conventional switching relay) plays a significant role in on-board electrics. Therefore, its function is described here: Terminal 75 of the...
Table of relays and control units Front under center console (dismantled here) the airbag control unit is located (arrow) with shock sensor. Mounting position of additional control units:...
Main and additional fuses Every electrical device in a car needs only a certain, precisely set amount of current. In accordance with this consumption of current in a given electrical...
Fuse table In the fuse box № Connected consumers Amps 1 Heated glass washer nozzles 5 2 direction indicators 5 3 Glovebox Light, Dashboard Light, System headlight...