How can I tell if my glow plug is working?
Observe if the glow plugs are getting the power they require by connecting a test light to the plug. If the test light lights up, the plug is receiving power. Evaluate whether or not the relay is able to supply the power required to start the diesel engine by testing the ohms of the circuit with an ohmmeter.
Is it safe to drive with the glow plug light on?
A qualified mechanic who has a code reader that is suited to your particular make and model of vehicle can retrieve this information, and then make a diagnosis of the problem and recommend a course of action. So, can you drive safely with the Glow Plug Light on?
Why does my glow plug light up when I start the engine?
If the test light lights up, the plug is receiving power. Evaluate whether or not the relay is able to supply the power required to start the diesel engine by testing the ohms of the circuit with an ohmmeter. A working relay will produce between 50 and 120 ohms. If the circuit is producing less than 50 ohms, the relay is suspect.
When was the last time my glow plug went off?
Last time my glow plugs turned on with the engine hot and running in the 1988 suburban they went out – the exhaust. Bad sensor allowed them to come on with a hot engine. But if the engine is cold enough and you have a misfire with white smoke you can think about it.
What to do when glow plug light won’t go off?
Either replace the controller or wire in a manual button to run the relay. The inhibit switch is on the opposite side near the same spot and has a two wire plug. The best thing to do with the inhibit switch is to jumper the plug and forget that thing.
Why does the glow plug light on the dash quit lighting?
On the water manifold/ t/stat housing is a temp sender this is for the ECM it could be bad and it is telling the ECM the engine is hot and does not need the glow heat. Easy test unplug it and try starting it, unpluged the ECM thinks it is stone cold and it will glow for a long time.
What should the voltage of the glow plug be?
The single heavy red wire term should be 12v all the time. The double heavy red wire term is to the glow plugs should be hot 12v when you hear the relay click on. If no voltage the relay is bad, Pin A battery voltage, key in run position, all the time ( this is feed by the 20 amp fuse ).
Why does my DS4 glow plug not go off?
The later 6.5’s with the DS4 don’t use the long winded afterglow that the 6.2 used. This is due in part to the higher injection pressures. So would it be better to just hardwire them?