What is this?

[Dreadflux]

Hi everyone,

I was wondering if all the pros can tell me what this unit is on my truck? I just purchased this truck and I’m trying to learn as much as possible, and so far everyone has been so great in answering my newbie questions. The reason I am curious, is it looks brand new.
Thank you for your time.

 

[TexasTruck]

Glow plug relay

 

[The_Josh_Bear]

That be a glow plug relay(round bit), and glow plug controller(rectangle bit). GPR and GPC for short!

 

[aggiediesel01]

Yep, the others are correct. Yours is missing it's protective cover so be careful around those terminals when checking your oil and don't accidently drag your dip stick across the stud where the heavy yellow wires connect, that one has 12V continuously and heavy gauge wire to carry lots of amps. It'd be better if you can find one and cover it up properly but you're in no real danger for now.

 

[Dreadflux]

Yep, the others are correct. Yours is missing it's protective cover so be careful around those terminals when checking your oil and don't accidently drag your dip stick across the stud where the heavy yellow wires connect, that one has 12V continuously and heavy gauge wire to carry lots of amps. It'd be better if you can find one and cover it up properly but you're in no real danger for now.

Thank you very much for this information.

 

[Littleredrig]

It’s your glow plug relay, usually it’s in the back of the engine towards the firewall… Looks like it has been relocated… I would try to find a cover for it.

 

[Old Goat]

It’s your glow plug relay, usually it’s in the back of the engine towards the firewall… Looks like it has been relocated… I would try to find a cover for it.

If the engine has a Turbo, then it is moved to the Valve Cover.

Goat

 

[Dreadflux]

Can someone take a picture of their cover? I’m trying to track one down, Thinking a junk yard might be the best bet. but a picture of what it actually looks like would be helpful. No luck yet on google search. Thanks.

 

[aggiediesel01]

Most important are the little tabs that hold it to the base. If those are broken, it has a hard time staying attached. Looking at the second picture you can also see that in the top part there are little circles to grip the top of the studs on the solenoid as well, sometimes those are melted if the solenoid has gone bad but the cover is still usually usable.

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[Cubey]

It’s your glow plug relay, usually it’s in the back of the engine towards the firewall… Looks like it has been relocated… I would try to find a cover for it.

Or make one from a plastic electrical outlet box or something like that.

 

[chillman88]

Can someone take a picture of their cover? I’m trying to track one down, Thinking a junk yard might be the best bet. but a picture of what it actually looks like would be helpful. No luck yet on google search. Thanks.

I don't really want to share this, because apparently nobody knows they exist, and I'm afraid they'll disappear if everyone finds out

DISCLAIMER: I HAVE NOT ORDERED ONE TO VERIFY IT'S CORRECT!!! I found this part number a while ago and saved it for future use. If it is wrong I apologize but it certainly LOOKS to be correct.

1990-1994 Ford Diesel Glow Plug Controller E7TZ-12A345-A | TascaParts.com

1990-1994 Ford part # E7TZ-12A345-A - Diesel Glow Plug Controller

www.tascaparts.com

 

[IDIBRONCO]

Somebody doesn't know their Ford part numbers very well. It's listed as "1990-1994" but it's a 1987 part number so it should fit all of the 7.3 style controllers.