Mirrors: Description and Operation
CIRCUIT OPERATIONThe illuminated rear view mirror contains two lamps and switches. Power for the lamps and switches is supplied on circuit M1. This circuit is protected by a 20 Amp fuse in cavity 15 of the fuse block and HOT at all times.
Power for the fuse is supplied on circuit A6. This circuit is protected by a fusible link located near the auxiliary jumper post on the left toe box.
The lamps can be illuminated by opening either door, closing the switch on the mirror, or turning the headlamp switch to the dome lamp ON position.
When the operator CLOSES the switch on the mirror, circuits M1 and Z1 are connected through the lamps. The Z1 circuit is the ground circuit.
When the operator opens either door, power is supplied on circuit M1 through the lamps to circuit M2. The M2 circuit is spliced and connects to the right and left door latch switches. The open door causes contacts in the door latch switch to CLOSE completing a path to ground on circuit Z1.
If the headlamp switch is turned to the dome lamp ON position power is supplied on the M1 circuit through the lamps to circuit M2. The M2 circuit connects from the lamp to the headlamp switch. A switch internal to the headlamp switch connects circuit M2 to circuit Z1, which is the ground path for the lamps.
An additional input to the mirror is supplied on circuit L7. This is the parking lamps feed from the headlamp switch.