When a car loses power and the glow plug light flashes, it typically indicates an issue with the engine management system, often related to a malfunctioning component such as the glow plugs, fuel system, or sensors. This can trigger a fault code in the engine control unit, leading to reduced engine performance to prevent damage. It's essential to diagnose the specific issue using an OBD-II scanner or by consulting a mechanic for proper troubleshooting. Ignoring these signs can lead to more severe engine problems.
Are your brake lights out - usually it's a fuse for the brake lights.
You can actually check the glow plugs with a common test light unplug the wire feeding power to the glow plug and connect the alligater clip the hot post of your battery and touch the tip of the glow plug with tester if the light comes on the plug is good also if you have 3 of 4 burned out the glow plug system will not function properly
Could be an indication that the engine computer has detected a problem with the glow plug system. You will need to take it in for service.
when the engine starts in pretty cold weather the glow plug light will flash a few times until the engine runs smooth.
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The glow plug controller or power solenoid has likely failed. The solenoid is located on the driver's side inner fender. If the solenoid tests ok with the key in run, then replace the glow plug controller.
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To test the resistance on glow plugs, first, disconnect the glow plug harness to ensure no power is flowing. Use a multimeter set to the ohms (Ω) setting and connect the probes to the terminals of the glow plug. A healthy glow plug typically shows a resistance reading between 0.5 to 2.0 ohms; if the reading is significantly higher or shows infinite resistance, the glow plug may be faulty and should be replaced. Always refer to the manufacturer's specifications for the exact resistance values for your specific glow plugs.
glow plug relay should have power to one side all the time. if not, your problem may be more than the power leed. need to know what year. vehicle is?
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We're do I find glow plug relay
A diesel glow plug solenoid typically connects to the vehicle's battery for power, receiving a direct electrical supply to operate. It is usually activated by the ignition switch or a relay, allowing it to control the flow of electricity to the glow plugs when starting the engine. This ensures that the glow plugs heat up properly to aid in cold starting the diesel engine.