Distribution Terminal +54

Distribution Terminal +54:

Operation
The positive supply is taken from battery 1 across distribution block 75 to:

- the contacts (terminal 30) of ignition switch relay 21
- terminal 30 of ignition switch 20, across white 29-pole connector 152A.

When the ignition switch is set to the drive position, terminals 30 and 54 of the ignition switch will be interconnected. Current will then flow through the coil of ignition switch relay 21 across white 29-pole connector 152A, and the relay will be energized. The relay contacts will close, and current will flow through the three distribution blocks (crimped connections) to fuses 4-13 in fuse holder 22A (fuses 2 and 4-13 on the Convertible).

The contacts of horn relay 68 and (1990 model) time-delay relay 26 for the radiator fan will also be energized when the ignition switch relay has been energized.

Anti-lock brakes (ABS) on the 1990 models
On cars with the ABS anti-lock brakes, fuse 10A in ABS fuse holder 302A will also be energized from the white 29-pole connector 152A when the ignition switch is set to the drive position.

Fault-tracing hints
1. Check the battery voltage.
2. Check the terminals of distribution block 75, and check that terminal 30 of ignition switch relay 21 is live.
3. Set the ignition switch to the drive position and check that ignition switch relay 21 operates. Terminal 87 of the relay should then be live.
4. Check that fuses 4 - 13 in fuse holder 22A are live (fuses 2 and 4 - 13 on the Convertible).
5. Check the relevant wiring.