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Ohm with a multimeter Not sure why my phone put ohmed
If you unplug the harness from the valve covers you can test the UVCH with a multimeter.
Glow plugs shouldn't be over 1.5
Injectors should be around 3.5
This is the layout of the pins
GP-I-I-G-I-I-GP
GP= glow plug
I= injector
G= ground
These aren't super duty UVCH's homie.
GP-I-G-I-GP..
OP, normally when the UVCHs melt down, it will be under the valve covers where you can't see them. I'd ohm test them all before pulling the valve covers to see if you can find which side is the culprit.
If the gasket connections are melted , you need to replace the gaskets and harness under them . You will likely need to repair the external plugs also . Ohm them out , or pull the valve covers and look for burnt/melted connections . Common nasty issue . I see it on both the double plug and single plug systems .I like the FoMoCo kits but have used some aftermarket kits with good results .
OP, normally when the UVCHs melt down, it will be under the valve covers where you can't see them. I'd ohm test them all before pulling the valve covers to see if you can find which side is the culprit.
I know this is a dumb question but electrical stuff is my downfall. I need to put the negative "prong" to a Ground. would the engine work?
Yes, just make sure it's bare metal and not covered in gunk or paint. One of the bolts holding on the ac or alternator will work too. Or the negative post of the battery.
Ohm is a value for electrical resistant.The higher the Value, the Higher the restriction. Kinda like this: Ford downpipe has a high restriction on the exhaust,therefore, the engine does not work as good. change it to a 3” round downpipe, with less restriction, you get more power.
Same with the electrical. High restriction, ie due to burned connectors, do not allow as much power to the injectors, therfore you have problems with running.
anyway, you need to measure also between the ground and the power cable. This link should help to troubleshoot the system