Hey guys I have a glow plug problem i am in the process of by passing the glow plug controler when I pulled the purple wire off the relay and tried to test it from the relay to the battery when I did this nothing happened so I thought maybe the relay was bad so I changed it and that still didn't fix it so I thought maybe i got a bad relay so I bought another one and when I tried testing it again with a wire straight from the relay to the battery still nothing happened how ever when i by pass the relay all together the system works so I have no idea what's going on. Please help

 

Have you gotten any further on your diag on this issue ????