The module is on the front right-hand side of the engine compartment to the right of the front fuse box wedge, slightly below it, next to the wing.
LOST COMMUNICATION WITH GLOW PLUG CONTROL MODULE or GLOW PLUG CONTROL MODULE CIRCUIT OPEN
The glow plug relay is on the drivers side of the truck in a relay box on the chassis frame behind the drivers side tire. which module is it?
the fault is glow plug module
Next to the fuse box
It's actually a module and its called a GPCM (glow plug control module) On every 6.0L its on the front of the right valve cover. It has a big green and black connectors you can't miss it!! Powerstroke57
to stop glow plug circuit from over heating, you need to replace the glow plug control module these modules cycle on and off at a given time interval these are also not expensive and are easy to change
bad glow plugs or faulty glow plug timer module
GPCM ( glow plug control module) is the module that controls the glow plugs along with the PCM. It's located on the right ( passenger side) front valve cover. It has two large square connectors one is green and other is black.
You have a problem in the glow plug system. You will need to test for a shorted glow plug by making a test harness with a 15 amp fuse in it and applying 12 volts to each glow plug to see which blows the fuse. You will also have to replace the glow plug module/relay which is loacted under the battery shelf under the hood. Be very careful when trying to remove the glow plugs. Only attempt with a fully warm engine ( drive it for 30 minutes first ). Do not try to force them to turn, they will break.You have a problem in the glow plug system. You will need to test for a shorted glow plug by making a test harness with a 15 amp fuse in it and applying 12 volts to each glow plug to see which blows the fuse. You will also have to replace the glow plug module/relay which is loacted under the battery shelf under the hood. Be very careful when trying to remove the glow plugs. Only attempt with a fully warm engine ( drive it for 30 minutes first ). Do not try to force them to turn, they will break.
glow plug control module
Chances are it's your glow plug relay has an open in it's coil windings or its your GPCM (glow plug control module) depending on which year you have.....? Or less likely that you have 4-6 glow plugs that have opens and are not working.... start with the module or relay (depending on year) and go from their. Good luck.
A Diesel engine ignites its fuel by compression. The temperature increase in the cylinder due to friction of compression and will need to reach a temp of about 1,000 deg f. During cold ambient tempters most diesel's will need help and it can done by the use of glow plugs, intake heater, or block heater located in a water jacket. you will most of the time find two of the three systems in use. The block heater may be used with either the glow plugs or an intake heater the block heater is normally a 110v that you plug in to an electrical outlet at home. A glow plug can also be used as a intake heater by placing it in the intake manifold or air intake tube.This is how they work in a Ford Power Stroke engineGlow Plug SystemThe 7.3L diesel engine uses a glow plug system which preheats air in the combustion chamber to improve cold engine starting.The system consists of eight glow plugs, the glow plug control module (12B533), powertrain control module (PCM) (12A650), engine oil temperature (EOT) sensor and barometric pressure sensor (BARO sensor) (12A644).The glow plug system is electronically controlled by the powertrain control module. The powertrain control module energizes the glow plugs immediately after the key is placed in the ON position and then determines how long the glow plugs will be on according to the engine oil temperature and the barometric pressure. The required time for the glow plugs to be energized decreases as the engine oil temperature and barometric pressure increase.The glow plugs are self-regulating, and the powertrain control module controls relay ON time.The powertrain control module protects the glow plugs by energizing them for short durations if the battery voltage is abnormally high.