LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 1990 >> Forward Control 6.2 J, Automatic, 400/M40 >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel - Standard & Electronic >> Testing >> Check Gauges Light Testing - C, K, S, & T Series >> Light Always On

Light Always On

Check for inoperative coolant temperature and oil pressure gauge circuits. Replace coolant temperature and/or oil pressure gauge if necessary. If coolant temperature and oil pressure gauge circuits are okay, replace defective instrument cluster.