BE/Body Electrical System, page 50

BE-50

BODY ELECTRICAL SYSTEM — Instruments and Sender Gauges

SECTION | TROUBLE

J | Tachometer | Lights do not dim when light and rheostat S/W turned ON.

Only tachometer? | No → Refer to section C
↓ Yes

Remove meter and connect sub-harness (SST)
↓

① With the ignition S/W at ON position, light S/W turned ON and rheostat turned to MAX, is there 3 to 5V between terminals 4 and 6 of tachometer connector? | No → Replace speedometer
↓ Yes

Replace tachometer

NOTE:
Connector dimming is performed by the dim signal (Dim②) of the speedometer.

1

Tachometer

6 4
Dim ②
GND

ON   MAX (Fade)
MIN (Bright)
OFF