Post a reply to the thread: Glow plug wiring harness
You may choose an icon for your message from this list
Please enter the name by which you would like to log-in and be known on this site.
Please enter a password for your user account. Note that passwords are case-sensitive.
Please enter a valid email address for yourself.
A) Welding/Fabrication Shop B) Plant/Production Line C) Infrastructure/Construction/Repair or Maintenance/Field Work D) Distributor of Welding Supplies or Gases E) College/School/University F) Work Out of Home
A) Corporate Executive/Management B) Operations Management C) Engineering Management D) Educator/Student E) Retired F) Hobbyist
Will turn www.example.com into [URL]http://www.example.com[/URL].
Re: Glow plug wiring harness Originally Posted by 12V71 Used to be that most of the US made cars pre 1955 with 6 volt systems were positive ground. My old '55 Ford pickup was positive ground 6v, but my brother's '56 was 12v negative ground. I had a mid '50s Mack with a crane that was positive ground and still run into a few late '70s Freightliner farm trucks with positive ground. Those wont run most LED tail/turn lights, and alternators are a challenge to get. Wow. I had no idea! Any old cars I worked on must have been converted to 12 volt negative ground by the time I started twisting wrenches. A few third reich road oilers (VW's) had six volt systems, but they may have been positive ground too? Most fishing boats are 24 volt negative ground (in my tiny world). Used to be quite a few 32 volt systems too.
Re: Glow plug wiring harness
Re: Glow plug wiring harness Originally Posted by 12V71 IIRC, the "U" model had the cab squashed all the way over to the left side with a really LOOONG mirror bracket on the RH side. A farm up this way had a bunch of them powered with 6 cylinder Scania engines. Yep thats the one. had the maxi brake button on the back wall ... after they took it off the road they took off the 5th wheel and chained a mafia block on the back to plow the parking lots..... couldn't kill it.
Re: Glow plug wiring harness Originally Posted by John T Been so long I dont recall It was probably a late 60’s U model. IIRC, the "U" model had the cab squashed all the way over to the left side with a really LOOONG mirror bracket on the RH side. A farm up this way had a bunch of them powered with 6 cylinder Scania engines.
Re: Glow plug wiring harness Originally Posted by crab fisherman Was the Mack truck a Perkins diesel? . Been so long I dont recall It was probably a late 60’s U model.
Re: Glow plug wiring harness Originally Posted by crab fisherman Some old British cars were positive ground. Was the Mack truck a Perkins diesel? I'm part time dyslexic so my mind is eternally messed with. Used to be that most of the US made cars pre 1955 with 6 volt systems were positive ground. My old '55 Ford pickup was positive ground 6v, but my brother's '56 was 12v negative ground. I had a mid '50s Mack with a crane that was positive ground and still run into a few late '70s Freightliner farm trucks with positive ground. Those wont run most LED tail/turn lights, and alternators are a challenge to get.
Re: Glow plug wiring harness Originally Posted by John T One of the first Mack trucks I drove was a positive ground system That will mess with yer mind. Some old British cars were positive ground. Was the Mack truck a Perkins diesel? I'm part time dyslexic so my mind is eternally messed with.
Re: Glow plug wiring harness Originally Posted by 12V71 That can drive some people nuts trying to troubleshoot problems if they're unfamiliar with that system. One of the first Mack trucks I drove was a positive ground system That will mess with yer mind.
Re: Glow plug wiring harness Originally Posted by bigb Yep, the Stancor shown has a grounding terminal, the Powerstroke uses a ground signal to close it. You see quite a bit of that in the newer big trucks to control various relays and Kenworth still uses grounding switches in the dashboard. That can drive some people nuts trying to troubleshoot problems if they're unfamiliar with that system.
Re: Glow plug wiring harness Originally Posted by 12V71 Pretty sure the Stancor is not internally grounded like yours, just needs a ground jumper wire on one small terminal. Yep, the Stancor shown has a grounding terminal, the Powerstroke uses a ground signal to close it.
Re: Glow plug wiring harness Originally Posted by 12V71 Pretty sure the Stancor is not internally grounded like yours, just needs a ground jumper wire on one small terminal. Ahh, OK. makes sense.
Re: Glow plug wiring harness https://www.alliedelec.com/m/d/3fc07...9df1618654.pdf
Re: Glow plug wiring harness Originally Posted by John T Will the Stancor work if you only use 1 of the activator terminals? I need to replace a Relay .... But it has 2 large terminals and only 1 small term. I'd love to use the Stancor if it works..... Also, would you have the dimensions of the Stancor? It needs to fit in an enclosed box.. Attachment 1726044 Attachment 1726045 Pretty sure the Stancor is not internally grounded like yours, just needs a ground jumper wire on one small terminal.
Re: Glow plug wiring harness Originally Posted by bigb The OEM relay is weak, there's a White/Rogers (Stancor) relay that fits in there, it's nearly twice the size of the OEM and a tight fit. I put one in in 2009 and it's still working, in fact I have never heard of the Stancor failing. Will the Stancor work if you only use 1 of the activator terminals? I need to replace a Relay .... But it has 2 large terminals and only 1 small term. I'd love to use the Stancor if it works..... Attachment 1726044 Attachment 1726045
Re: Glow plug wiring harness I'm a long time oil burners forum member. I've got a low mileage '94 factory turbo 7.3 idit 4x4 F250. I'm friends with Wes who is the owner of the shop in the link I posted. I've spent a week at his shop working with him on my truck. He's a great guy and a powerhouse of knowledge on the old Ford trucks. If you talk or order from him, tell him that Rich/Saburai said hello! Here's the glowplug harness that he builds: https://classicdieseldesigns.com/pro...cement-harness
Re: Glow plug wiring harness Originally Posted by BillE.Dee I'd have to look thru my "stuff". I think that I have a factory manual for the 7.3. It can be yours if you like. The wiring would be the same for all years. The difference might be in the glow plug controller. I'm pretty much done with the out of home wrenching. I messeged you
Re: Glow plug wiring harness I'd have to look thru my "stuff". I think that I have a factory manual for the 7.3. It can be yours if you like. The wiring would be the same for all years. The difference might be in the glow plug controller. I'm pretty much done with the out of home wrenching.
Re: Glow plug wiring harness Originally Posted by Mattinthebox Not sure if you got it sorted or not but besides the better relay as others said you should make sure your wiring has good clean connections at the controller, especially the ground. I have a 1990 7.3 IDI. I made my own *bullet proof* harness for under $20-$30 in materials. I used really good materials, wire, connectors, shrink tube, etc. I think I did a write up on it with pictures in one of the diesel forums but that was some time ago. Everything was crimped, soldered and sealed from any oxidization so it would last. If you have the bullet glowplugs (ZF's) you can use #10 butt connectors for the plugs, they fit great and will never melt or become brittle. It's basically a single wire harness/connection that goes from the controller to each of the glow plugs. There's no firing order or anything like that, just use a heavier gauge wire to compensate for the amp draw and you'll be fine. I have pics and wiring diagrams for everything related to the 1990 7.3 IDI ... Here's the controller wiring, it's pretty simple. Nothing got sorted out, it just started workin again on its own, for now i been keepin the rig plugged in and it works. Occasionally I dont lplug her in and it still works. So when the weather gets a bit more to my liking i want to either make or find a complete harness, not just the one for the glow plugs, but the one that is attached to it as well. Im not really good with electrical malfunction diagnosing buit I think I have enough ability to start all over from nothing
Re: Glow plug wiring harness Not sure if you got it sorted or not but besides the better relay as others said you should make sure your wiring has good clean connections at the controller, especially the ground. I have a 1990 7.3 IDI. I made my own *bullet proof* harness for under $20-$30 in materials. I used really good materials, wire, connectors, shrink tube, etc. I think I did a write up on it with pictures in one of the diesel forums but that was some time ago. Everything was crimped, soldered and sealed from any oxidization so it would last. If you have the bullet glowplugs (ZF's) you can use #10 butt connectors for the plugs, they fit great and will never melt or become brittle. It's basically a single wire harness/connection that goes from the controller to each of the glow plugs. There's no firing order or anything like that, just use a heavier gauge wire to compensate for the amp draw and you'll be fine. I have pics and wiring diagrams for everything related to the 1990 7.3 IDI ... Here's the controller wiring, it's pretty simple.
Re: Glow plug wiring harness Originally Posted by thegary I know what you mean . The only thing I can say is that the grid heaters have a temp sensor in the intake manifold that reads the intake air temp and it being so cold out that the grid heaters were being told that the intake air was too cold so they would kick on. So how did it start and how did it run when the heaters kicked on? 25 below is a bit chilly, Ive worked outside in those temps and when it was windy, it wasnt easy at all. Little guy didnt wanna get outta the nest when I had to piss, cant say I blame the guy either, then when I got to do the deed I made a pisscicle and froze myself fast to the side of Brown Mountain back behind Kaska PA...Feb somethin 1994.
Re: Glow plug wiring harness Originally Posted by Popeye an old miner Thats intresting I never knew that or evenn heard of it I know what you mean . The only thing I can say is that the grid heaters have a temp sensor in the intake manifold that reads the intake air temp and it being so cold out that the grid heaters were being told that the intake air was too cold so they would kick on.
Re: Glow plug wiring harness Originally Posted by thegary About 15 years ago I had to drive across Northern Wisconsin to a mine in Northern Minnesota for a job. It was a 4 hr drive and it was -25 degrees. My old 97 Cummins never got above 120 degrees and the grid heaters kicked in about every 2-3 minutes all the way there for 4 hrs. That is the only time I ever remember them kicking on after the engine was started and I have owned that truck for 21 years. The 5.9 Cummins has grid heaters instead of glow plugs. Thats intresting I never knew that or evenn heard of it
Re: Glow plug wiring harness Originally Posted by BillE.Dee a piece of cardboard or a cool looking weather front will help the engine operate efficently. You have to keep a little hole in the center open...about 1/3 to 1/4 the total grille opening. Take a look at the road tractors in the winter time, they got weather fronts on them for a reason. On a pickup or medium duty truck with a viscous (fluid drive) fan it's especially important to keep that center opening so you don't overheat the fan clutch.
Re: Glow plug wiring harness For relays there are continuous rated and intermediate rated ones. Most glow plugs are single wire where you run a hot wire to them and they ground through the case. A continuous duty relay a push button switch and some 10-12 gauge wire and you’re good to go
Re: Glow plug wiring harness a piece of cardboard or a cool looking weather front will help the engine operate efficently. You have to keep a little hole in the center open...about 1/3 to 1/4 the total grille opening. Take a look at the road tractors in the winter time, they got weather fronts on them for a reason.
Re: Glow plug wiring harness About 15 years ago I had to drive across Northern Wisconsin to a mine in Northern Minnesota for a job. It was a 4 hr drive and it was -25 degrees. My old 97 Cummins never got above 120 degrees and the grid heaters kicked in about every 2-3 minutes all the way there for 4 hrs. That is the only time I ever remember them kicking on after the engine was started and I have owned that truck for 21 years. The 5.9 Cummins has grid heaters instead of glow plugs.
Forum Rules
