Where is the glow plug control module located?
This is done by a glow plug control module. Located on the engine and with a direct connection to the engine control unit, the control module uses a microprocessor to analyse input from the engine control unit to determine information related to the working of the glow plugs.
Where is the glow plug relay located on a 7.3 Powerstroke?
The one toward the rear of the truck is the glow plug relay. Note: This relay is the replacement for all years of Powerstroke trucks. A few trucks will have only one small terminal instead of two.
How much does a glow plug relay cost?
If the diesel glow plug relay is faulty, you may notice symptoms, such as an illuminated check engine light, poor fuel efficiency, difficulty starting, and white smoke coming out of your vehicle’s tailpipe. An aftermarket replacement may cost you around $20 up to $125.
How does a glow plug control module work?
The glow plug control module determines the timing and electric current required by the glow plugs based on input from the Engine Control Unit; The heating element in the glow plug is electrified, so it heats up and emits visible light (hence the name);
What does a glow plug relay do?
What is a glow plug relay? The glow plug control unit uses a glow plug relay to switch the current for the glow plugs on and off. To reduce the current needed, glow plugs are often distributed across two circuits, with two glow plug relays. This is often used in older glow plug systems.
What are the symptoms of a bad glow plug?
A number of faults can cause the engine warning light to illuminate – below, we outline the clues which point to faulty glow plugs.
- Hard starting. A hard starting engine is the most common indicator of damaged glow plugs.
- Engine misfiring.
- Rough idling.
- Decreased fuel efficiency.
- White smoke.
- Black smoke.