Help with glow plugs

[decableguy2000]

Help me figure out if my glow plugs are going bad. I have a Farmtrac 300 DTC with a Mitsubishi S4L 1.5L engine. Hard starting when temps drop to around freezing. The book says the standard is .55 ohms. mine are reading .7-1.7 ohms. Should I replace them

Also need a cross reference for the glow plug to Mitsubishi #32a6603100, markings on the plug JA31M 10.5v h6b5

 

[buickanddeere]

Better to find a way to measure current flow through each injector when energized . Glow plugs or not , plug the block heater in to pre-warm the engine .

 

[joeyd]

Here is a cross to NGK

NGK Glow Plug for Branson 235, F355 Replaces 32A66- [BGP-663] - $22.29 : Diesel Tractor Parts!, Parts Super Store

 

[Deere Dude]

I took mine out and put 12v directly from the battery to them while on a bench. They will turn red in a couple seconds. Ground the body and hot on the tip.