Instrument Cluster / Carrier: Description and Operation

CIRCUIT DESCRIPTION
Battery voltage is applied at all times to the coil and contacts of the tail lamp relay from the fusible link (B+). With the light switch (multifunction switch) in the PARK or HEAD position, ground is provided to the tail lamp relay coil through the light switch.

Battery voltage from fuse 28 is then provided to the illumination lamps through the closed contact of the tail lamp relay.

Ground is provided to the illumination lamps through the rheostat.

The rheostat controls brightness of the illumination lamps.