Power Supply (+54 Circuit)

�U�+Power Supply (+54 Circuits):

WIRING DIAGRAM

DESCRIPTION OF OPERATION
From battery 1, positive voltage is fed via distribution block 75 to:
^ Terminal block 230 (+30) and on to connection 30 on ignition switch relay 21.
^ Connection 30 on ignition switch 20.

When the ignition switch is turned to the Drive position, terminals 30 and 54 on the ignition switch are connected to each other. Current is then supplied to;
^ Fuse 3 in main fuse box 302A (ABS)
^ Fuse 31 in main fuse box 22A
^ Ignition switch relay 21

The relay contact in ignition switch 21 closes and current is supplied via terminal block 231 (+54) to:
^ Fuses 2, 3 and 5-12 in main fuse box 22A behind the glove box.
^ Fuses 3 and 9 in main fuse box 342A in the engine bay.

FAULT DIAGNOSIS HINTS
1. Check the battery voltage.
2. Check the connections on distribution block 75 and the +30(230) and +54(231) terminal blocks.
3. If current is present on the +30 terminal but not on the +54 terminal, check that ignition switch relay 21 is working by turning the ignition switch to the Drive position. Current should then be present on relay connection 87.
4. Check the relevant wiring harness.