928 Tech Tips

Fuse #9 keeps blowing which causes lights and cluster illumination of a 928GTS to be off (dark)

But what is Fuse #9 responsible for? Well, it is a bit of a challenge to follow the wiring on the schematic, but this might help:

Fuse #9 (5A) in a 928GTS

Via K11 on the CEB connector via connector T5 pin 26 to the Potentiometer pin 2
- From Potentiometer pin 1 to fog light switch pin 58 (only illuminates the switch)
  - From Fog light switch (D4-M21) ODO meter reset switch (only illuminates the switch)
- From Potentiometer pin 1 to T5 pin 27
  - Via T5 pin 27 to clock pin 3 (only illuminates the switch)
    - Via clock pin 3 (E1-G34) to T30 pin 3
      - Via T30 pin 3 to AC button pin 5 (only illuminates the switch)
      - Via T30 pin 3 to Climate control panel pin 3 (only illuminates the panel)
  - Via T5 pin 27 to (E4-F98) to central locking switch pin 4 (only illuminates the switch)
    - Via central locking switch pin 4 (D98-E52) via T21 pin 3 seat control unit pass.side pin 1 (only illuminates the switch)
  - Via T5 pin 27 to (E4-D59) via T20 pin 3 seat control unit driver.side pin 1 (only illuminates the switch)
  - Via T5 pin 27 to (F4-E22) resistor to lower voltage for cluster background adjustment.
  - Via T5 pin 27 to (E4-H32) cigar lighter pin 3 (only illuminates the cigar lighter)
  - Via Resistor to cluster connector 4 pin 14 for instrument light adjust the background light for instrument cluster
  - Via T5 pin 27 to (J4-J33) hazard switch pin 1 (only illuminates the switch)
  - From hazard witch pin 1 to (J4-H33) to rear fogger switch pin 58 (only illuminates the switch)
Via K11 on the CEB connector to (K4-D29) to cluster Plug 1 pin 2 (powers background light for instrument cluster)

Explanation: via T5 pin 27 to (J4-J33) hazard switch pin1 ….. means: follow connector T5 pin 27 on the schematic from position J4 to J33 where it is connected to the hazard switch pin 1

regards Theo

1992 928GTS midnight blue

The Netherlands