Toyota Celica Supra 1986 Service And Repair Manual page 598

BE-50 BODY ELECTRICAL SYSTEM - Instruments and Sender Gauges
SECTION TROUBLE
J
Tachomet•
Light! do not dim when light and rheostat
S/W turned ON.
Only tachometer? I No
Yes
Remove meter and conne<:t sub·harness ISSTI
Q)
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?
Yes
Rep lace tachometer
NOTE :
Conne<:tor dimming is performed by the dim signal
(Din@) of the speedometer.
Refer to section C
No
Replace speedometer
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