BE/Body Electrical System, page 42

BE-42				BODY ELECTRICAL SYSTEM — Instruments and Sender Gauges

SECTION				TROUBLE

C		Speedometer		Lights do not dim when light and rheostat S/W turned ON.

Only speedometer?
	Yes								Replace speedometer
	No

Remove meter and connect sub-harness (SST)

(1) With the ignition S/W at ON position,
check that there is battery voltage between
terminals 7 and 9 of sub-harness (SST)
when rheostat turned ON.
	No							(2) With the light S/W and
									rheostat turned ON, is there
									battery voltage on TC terminal
									of rheostat?
	OK								No		Yes

Does speedometer dim when other
meters are disconnected?
	Yes				No						Bad wiring between
											rheostat and meter

Replace speedometer					Check rheostat (See page BE-18)

Connect other meters one by one
to find bad meter.								Replace bad meter

1											2

											ON
											MAX
Sub-harness (SST)								MIN		(Fade)	Rheostat
											(Bright)
						TC (1)					OFF
					E	(1)								TC
													E