Ford Repair Questions? Ask a Mechanic for Answers ASAP
The only way to test the module is with the ford ids computer as it will perform an on demand self test of the module and the wiring. However the most common failure is the module itself. If its setting a code for the module you can rest assured its a bad module. Just check the wiring to the module and make sure the big green and black connectors are seated properly and the glow plug harness is connected on both side of the engine.