How much damage was done from this??
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Freshman User
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How much damage was done from this??
So I hit my glow plug switch today to start up the truck and let it sit and idle for about 5 minutes. When I got back to the truck to turn it off I found that the switch had stuck to the on position 
. I just put new motorcrafts in and I'm pretty sure they're shot. Could leaving the plugs on like this do damage to the engine?? I just want to make sure I didn't screw anything else up. I also noticed a burning smell, would this be the wires getting hot or did I fry something else that probably needs replaced? BTW I have a switch to control the plugs which you probably already know from above lol.
. I just put new motorcrafts in and I'm pretty sure they're shot. Could leaving the plugs on like this do damage to the engine?? I just want to make sure I didn't screw anything else up. I also noticed a burning smell, would this be the wires getting hot or did I fry something else that probably needs replaced? BTW I have a switch to control the plugs which you probably already know from above lol.
Logistics Pro
Joined: Sep 2010
Posts: 4,411
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From: Victor, MT
x3 with what they are saying, check the two big yellow wires, they are probably cooked...the Motorcrafts...eh...probably not...i ran a motorcraft into the 15 minute range on a battery, was red hot and smoke.....did this twice.
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Well I just checked everything out and it looks fine. I'll have to charge the batteries up before I see if everything works. The batteries have been bad for a while and have been jumpstarting the truck to get it started. The alternator is also shot and I plan on a 3g upgrade. I'm thinking the batteries died very shortly and the alternator couldn't handle the load so the wiring held up. I believe the burning smell was coming from the alternator lol.
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Well I tried to jump start the truck just now and no dice. I can usually hook the cables up and start it almost instantly but I left them on for several minutes and barely got a few cranks. My batteries must be completely toast.
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Posting Guru
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If you bought less than 1 year you return them for warranties. Did twice times on 2000 F350 and they just replace no problem but 1 year warranty expired you out lucky.
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Laughing Gas
Joined: Feb 2010
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From: Port Orchard, WA
Your glow plugs *may* be burnt up, but you can test them with an ohmmeter. There shouldn't be any damage to your engine, although as others have said, the wiring for the glow plugs may have gotten hot and burnt up. The switch itself is probably just fine, as long as it's not still sticking on.
Check the wiring and see what you find. And charge them batteries.
-Matt
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I have a button switch but I'm thinking of installing a toggle switch, of course there's the possibility of forgetting to turn it off. Maybe I could wire it to a buzzer or alarm when its on lol.
The wires seem to be fine and I can hear the plugs turn on when I hit the button. I hear them for about 3 seconds and then the batteries are drained. I'll take them out next chance I get and see if they all still work. Guess the first thing I need now are batteries, its untelling how old these are as they were on the truck when I got it.
I have no regrets about my glow plug bypass switch. I hated that stupid controller, all it gave me was problems. This system has always worked without trouble and I don't think it will be too difficult to make sure this never happens again.
The wires seem to be fine and I can hear the plugs turn on when I hit the button. I hear them for about 3 seconds and then the batteries are drained. I'll take them out next chance I get and see if they all still work. Guess the first thing I need now are batteries, its untelling how old these are as they were on the truck when I got it.
I have no regrets about my glow plug bypass switch. I hated that stupid controller, all it gave me was problems. This system has always worked without trouble and I don't think it will be too difficult to make sure this never happens again.
Cargo Master
Joined: Dec 2010
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From: Fort Worth, TX
Wires can be replaced easily. I would pull the GPs and make sure all the tips are there and that they didn't fall into the cylinders. Replace the GPs and any fried/damaged wires or relays. Also, I suggest a push-button switch so you can't just leave them on by accident.
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