I installed a new glow plug controller today. I wasn't sure I really needed one or if it was the glow plugs, until I removed it. Yep I think its bad, here is a pic of it.

 

Wow, yep, that qualifies as bad.

 

Success! So far anyway. It 57 here this morning and the ole girl fired up almost instantly. That's a first.

 

you should ohm out your glow plugs just to be on the safe side, it's easy with a OHM meter, unplug glowplug touch one lead to ground the other to the glowplug terminal and you should get about 4 ohms, cold. That way you know your ready for winter and you wont melt anything else.

 

I will do that, thanks. I was thinking about just changing them out anyway. Not knowing what brand of plugs are installed is making me nervous.

 

If they ohm out ok, put the money into something else, If you do replace use motorcraft and put neverseize on the threads.

 

Ok I have ohm checked the glow plugs, 1 is reading 6, 1 @ 7, 3 @ 4 and 3 @ 3. So what exactly does this mean???