L3710 glow plug

lugbolt

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Equipment
ZG127S-54
Oct 15, 2015
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Mid, South, USA
your service manual has all the information you need.

basically you need to know how the system works. Once you know that, you can figure out which components to test, and from there you'll eliminate the known good ones leading you toward the bad one(s).

"Normally" the controller is bad but I've put a bunch of relays on too, and a few temp sensors. And plenty of wiring repairs.

So it "could" be any component that has to do with the glow plug system. That's why you need a work shop manual, a volt meter, and some basic mechanical and electrical knowledge. But fear not, you CAN do it.
 
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rbargeron

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L5450, L48, L3250, L345 never enough attachments
Jul 6, 2015
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western ma
The likely culprit is the controller. My light stayed on and I put in one of these. Cured.
 
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OrangeKrush

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BX2680, LA344 with Piranha tooth bar, LP PF 1242, LP Rear Blade, KK 60" BB
Nov 15, 2020
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Indy
glow plug light stays on. need help
Found this but did not read it, might be of some help.
 
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Roadworthy

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L2501 HST
Aug 17, 2019
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Benton City, WA
Put a voltmeter on the glow plugs. See if they stay on or only the indicator stays on. The next step is to find out what controls power to the glow plugs. There is likely some kind of controller. Try to locate a schematic.
 
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North Idaho Wolfman

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L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
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Sandpoint, ID
Get the WSM (aka service manual) for your tractor.
It will explain how to track down what is causing the issue.
 
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PoTreeBoy

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L35 Ford 3930
Mar 24, 2020
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WestTn/NoMs
Unless there's a short in the wire between the light and the glow controller, the controller is bad. I bought a clone on eBay.
Don't run it with the light on or you'll have burnt out glow plugs. If you have to run it unplug the controller to turn the glow plugs off.
 
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