GP's and continuity

[Gizmoman]

Hey guys,
It's been a while since I posted but I'm still at my slow rebuild. I have been working on the wiring and so have been posting on the Samba as it pretty much van related.

However, I am getting to the wiring of the engine and I am doing the GP "pimping" as recommended here. The way I understand it, running separate wires to each GP allows you to check them individually without removing them.

I ran all the wires with one color (nicely heat shrink wrapped the set) and was getting ready to put wire tags on each one (1,2,3,4). I figured it would be easy to find which was which by checking continuity - no luck. Each one shows continuity (grounded) regardless which wire I test. I had to loosen each nut (split eyelet) and remove each wire to test and tag .
Can anyone tell me what I'm missing?

I get that the GP's wouldn't heat without being grounded but then what's the point of the individual wires?

[92EcoDiesel Jetta]

Simple, you're reading continuity on all four because none of your glow plugs are burned out. Now that they are labeled you will know which one is burned out when one burns out.

If you had labeled the wires before you connected them to the glow plugs you wouldn't be asking this question.

[Gizmoman]

OK, got it.

If you had labeled the wires before you connected them to the glow plugs you wouldn't be asking this question

Thanks for pointing out the obvious

I do appreciate the clear answer though.
Thanks.