Glow Plug Controller
WARNING: This page does not describe the selected car, but rather 19 other vehicles, including the 1996 GMC Yukon, 1996 GMC Vandura Special, 1996 GMC Vandura, 1996 GMC Suburban, and 1996 GMC Savana Special. However, it is still accessible from the selected car via links, so may be relevant.
- Ensure coolant temperature is less than 80°F (27°C) before beginning test. Place ignition switch in RUN position and allow glow plugs to cycle. After 2 minutes, crank engine for one second. It is NOT important that engine starts. Return ignition switch to RUN position. Glow plugs should cycle on at least once.
- If glow plugs do not cycle, disconnect controller (controller is located on top rear of valve cover). Connect a 12-volt test light between Pink/Black wire terminal of harness connector (terminal "A") and ground. See Fig 1. With ignition switch in RUN position, test light should be off. Test light should illuminate when engine is cranked.
- If test light does not illuminate as specified, repair short or open in engine harness Pink/Black wire. If test light illuminates as specified but glow plugs do not cycle, replace controller.