Electrical

 

Schematics

Schematic Diagrams

Schematics 1988 928s4

Pin and function conventions DIN 72 552

CEB connector numbering

 

Fan control

Fan control unit repair

Fan control unit troubleshooting

Cooling Fan funny business

Cooling fan circuit explained

 

Battery and Alternator

Battery Choices

Battery Specs and Dimensions (Varta, Berga)

Battery drain

Power drain probing and short circuit tester

Battery maintenance and charging

More info on battery tech

Low Voltage

Voltage problems and over-voltage damage

Battery maintenance

Ground straps

Ground points form ECU's  

Adjustable Regulator

Voltage fluctuations

Cooling of the alternator

Alternator wiring

Alternator and Resistor types

Alternator woes: (lack of) charging

Alternator charging failure  

Alternators and charging

Alternator or battery dead

Alternator test

Testing the Alternator

Alternator models and specs

Alternator Brushes and parts

Alternator Diodes testing

Bosch Alternator Parts

Cooling hose on alternator

Ueberholung der Lichtmaschine

Alternator rebuild 115A

 

Starter

Starter motor assembly and mounting

Starter does not work

Starter solenoid

Jump starting a 928

 

Central Electrics Board (CEB)

Blower fuse fried on CEB

Diffferences CEB

CEB complete layout

 

Electrical Maintenance Job

Annual Electrical Maintenance

AMP connectors and repair

 

Bulbs and lights

GTS bulbs overview

All the 928 bulbs in overview

LED changeover

Third brake light

Daylight driving lights

 

 

Control Units

Control Units Annotated view and parts **

Control Units locating

Cruise Control unit repair

Resetting the Brake Warning light

Diagnosing central warning light

Repairing Central Warning Unit

Central Warning Light explained

Diagnosing the Tail Light warning light

Bulb controller problems

Bulb check controller and LED bulbs

Bulb (lamp) check unit bypass

Bulb (lamp) control unit modification

Bulb control unit differences

Installing the lights-on warning control unit (relay)

Jumpers / Bridges for the anti theft device

Alarm controller in a s4/gt/gts

Alarm Unit (factory) disable

Keyless entry installation

Fernbedienung Sachs alarm einbauen

The HVAC controller

Central locking controllers

 

Relays

Relay and special units

Relays detailed info

What is an X - Relay ?

Water leaking on the relay panel

Fuel Pump relay bypass

Relays and fuses 1992 GTS

The FCU relay (XIX)

 

Accessories

Where to take 12V accessories power from

 

Bosch docs

Bosch sensor information

Bosch knock tech

Bosch Fuel Injection Systems

Bosch_ABS_2S

Bosch Technical Instruction_K-Jetronic

Bosch Technical Instruction L-Jetronic

 

Misc

Warm-up valve operation

Radio Antenna amplifier

Radio Tacho signal

Throttle switch test

Wiring Diag help - How to Read the Schematic

Door switch fix

Nav Radio connecting (Becker Highspeed)

How to build a Lambda and MAF meter

Ignition switch assembly

Ignition switch problems

Early car backup lights

9268 tester manual rewritten

GTS won't start, starter lockout

 

Note: all of the technical information is provided without any filtering. Any damage caused by using or applying the information is the risk of the reader. The publisher (me) can not take any legal responsibility whatsoever. Please do not use any information from this website if you do not accept this condition.


View My Stats