GP controller card question

[jakwi]

Hi all,

I've been searching for two days now and I still can't find a schematic for the GP controller Card. I found the wiring diagram for the system, but not for the card itself. Does any one have a copy? I'm pretty sure I've seen it before.

My GP controller card quit working.

The wait light still cycles normally, but the card isn't controlling the GP relay.

I wired up a quick and dirty manual control, but I'd still like to figure out what happened with the stock controller. (so I know that the relay, and glow plugs are working)

I pulled my GP card out and it didn't look burned, none of the diodes and transistors were shorted, so that only leaves the IC, which from what I've read is a LM339.

Anyway, suggestions would be greatly appreceated.

thanks
Jason

 

[doghead]

As far as I know, nobody has shared/posted the GP card schematic on this site.

I thought most people that have fixed failed cards, had replaced the power transistor. ( have some extra Transistors F/S)

I've also seen bad diode and circuit board failures.

At one time, I did have the IC number, but for some reason I decided it wasn't worth it to rebuild the cards.

There was a thread a while back, where someone was about to offer to repair the cards. Did you find that thread?

 

[akonitony]

Try taking your card to your local Radio Shack. Make sure you find someone there who knows electronics well enough to operate a solder iron safely, and they may be able to fix it for you. I had a LED burned out on the circuit board of my 2006 Chevy 2500HDs AC control panel. The only way to fix it, according to the dealership I purchased the truck from, was to order the whole board for over $300. I went to R-shack and the guy behind the counter found the exact LED bulb I needed, and replaced both sides (it has the dual air control) for less than $3. Now I know this isn't the same as a GP contoller card, of which I bought 4 extra ones off e-bay, and sorry, but they are not F/S, but maybe you too can get blessed like I did with R-shack to the rescue.
Just my

 

[jakwi]

I really thought I had seen it on here before, but maybe not, I haven't needed it until now.
I've found the IC number and the transistor number. LM339, and 2n6388 respectively. I'm actually pretty good with a soldering iron, so I guess I'll try swapping them out.

I did see the thread that offered repair services. I was just hoping to do it myself.

Anyway Thanks for the help, If I come across a schematic I'll post it.

Jason

 

[Warthog]

Before you start rebuilding the card, open the Tech Manual and check out the Glow Plug system first. There is a step by step procedure to check the system.

It may well be the card but you won't know until you diagnose the complete system.

With a multimeter it only takes a few minutes.

 

[jakwi]

Warthog,

That is a good point, and that is what I did, In the end it still led me to the Card. I believe it was the final transistor, but I replaced both that and the IC. When I went to buy an LM339 (IC), and 2n6388(Transistor) they gave me an NTE263 (transistor) and an NTE834 (IC, quad comparitor). I replaced them, and it works, so I'm a happy camper. Anyway I just wanted to post my results.

 

[1stSarge]

Thanks for the follow up !!

 

[rnd-motorsports]

Now that is what the world needs more like this! someone who is not scared to try!
I think I saw it on here ( ITS NOT YOURS UNLESS YOU BUILD IT!!!)

 

[Warthog]

Now that is what the world needs more like this! someone who is not scared to try!
I think I saw it on here ( ITS NOT YOURS UNLESS YOU BUILD IT!!!)

That's Barrman's signature line.................