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Home >> Lexus >> 1998 >> SC 400 >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panel >> System Tests >> Test No. 9: Tachometer Does Not Operate

Test No. 9: Tachometer Does Not Operate

Disconnect instrument panel connector "A". Start engine. Using DVOM set to Hz (Hertz), check voltage between connector "A" terminal No. 9 (Light Green wire) and No. 10 (Blue/Black wire). See Figure. If voltage fluctuates, replace circuit plate. If voltage does not fluctuate, repair Light Green wire between connector "A" terminal No. 9 and igniter (SC300) or ECU (SC400).