Test 19: Cruise Main Light Problem

Disconnect connector "D". Turn ignition on. Ground connector "D" terminal No. 3. If light bulb illuminates, repair open circuit between connector "D" terminal No. 3 and cruise ECU. If wiring is okay, replace cruise ECU. If bulb does not illuminate, check bulb. Replace as needed and retest. If bulb is okay, install a known good circuit plate and retest.