Well, it certainly wasn't paradise when with my dashboard light. SES light came on about 3 weeks ago, cleared it, and no return until yesterday. Hard start, short glow time, no clickety click - hmm. . .

So I went down to the favorite discount autoparts store to find out what my winning numbers were. I was placing my bet on either maybe an ECT sensor, or glow plug relay. Well, 380 it was. Of course, it doesn't actually spell out glow plug relay fault on their little do-dad. Anywho, just wondering out loud here if that is correct diagnosis or not?

That is correct description for code 380 see list in FAQs

Sorry there TD, I didn't realize that this would fall under a "F"AQ! I though it was just an AQ. . .http://www.dieselplace.com/forum/images/smilies/smile.gif

Called the local stealer today. They said it's $72.00USD! Seems a bit high for dat little do-dad. What's so special about this thingy here anyway? Anyway to wire around it and put in a start silnoid instead without SES light?

That should be available in aftermarket I'm thinking

yes, dat little do-dad has a thermal timer inside, starter relay doesn't.

So, how does that thermal relay work? Does it work as a time delay? If so, then how does it work in conjunction with engine temperature - (long and short glow times)?

Coming back to explore this topic here once again. Now the relay that started working, isn't working at all now. Before I pull the engine box off, and the ten thousand wires, cables, wire looms, and other pains in the kester out of the way to access that little baby, I had a question here for TDG. I got to thinking about the "timer" you were talking about. . . did that timer only exist on non-PCM controled glows, or did it come on all makes and models of glow systems. I show three wires in my Haines manual going to the GPR, and they are: Pin A - ingition power (pink), B - PCM GP Relay Circuit (yellow) and C - ground (black). Seems to me, if you just used B & C with a relay, you'd have the same thing? Or am I missin' something?

Kreb I've been in the woods for a week give me some time to catch up, OBDII PCM controls the glow cycle, so relay is only part of the problem, need to check plugs and grounds as well, for short ther I think Kennedy's site has some glow system info; looks like another link for the FAQs, glow system trouble shooting.

Your working on your bus? so your going through the doghouse right? GP relay should be even more easily accessible to you than to us truck guys. I've never heard of anyone using a different relay, I doubt that hooking up a starter/similair relay inplace of the GP controller will fool the PCM into not setting the P0380 code though.

Yah, you're right about the ease of getting to that relay. . . it's just gettin' that doghouse off de thing. It's about 15+ minutes just to get the dog house off, and about 45+ minutes to get it back on, with a few walking trips walking around the driveway with all those little "wingdings" floating around your head of nasty thoughts of "who thought up all this mess anyway?" Just want to do this one time, without extra needless expense.

Well, just picked up new GP relay at NAPA. Yes, thanks TD, it was available aftermarket. $51 as compared to the 70+ at the stealer. Pulled out the cabling, wiring, and hair, got to relay, and the post was melted down. Turns out the top post was loose, and melted the plastic on the relay. When the plastic melted it interfered with the contact on the underside, and would not make contact. Here are the pics too.

Little circuit board in there looks like it's proprietary too.

Great another success story amid a seastorm of help me my 6.5 is broken posts, kreb you got a macro feature on that camera, try that, when I do close up I find that setting works best, especially if you are taking a pic, looking thru the viewer and holding stuff.

Rremember a couple of mos back couple of guys ragging me for not getting my hands or engine dirty, as the close ups in macro mode showed it had indeed been a while since I had to work on my truck.

Yep, two years of photography sure did pay off in high school didn't it? My camera doesn't have any optics on the front, so it's just a digital zoom. I'm used to depth of field, focus, apperature, and the dark room. Dis point and click business, well, it's quicker, but not as pretty. The teacher helped us with subject matter, but not glow plug relays.:rolleyes:

You think thats bad try taking a digital pic of inside a jet engine thru a camera attached to the end of a optic probe 2' long, was a challenge using 35mm even worse going digital.