On my dash below my Glow Plug light is a Engine Temperature light. This rather warm morning when I went to start my old `86 the Engine Temp light came on and my Glow Plug light didn't. The engine refuses to start. Is there a over temp shut-off switch? I swear I heard the glow-plug solenoid engage.... however I didn't dig up the multi-meter to verify there was juice to the glow plugs. Could someone point me to an appropriate tread? I've had no luck searching. THANKS!