the relay was not activating, all glow plugs tested good.

i added my own ground and it still didnt work? so i swapped it out for another one. and now i was only getting 10v coming out of it. but at least it was turning on. what i did was open the case and i noticed that there was some corrosion around point connections, so i filed them clean, now i get 12v out. glow plug light comes on and car fires right up.

thanks.