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Discussion Starter · #1 · (Edited)
2014 JSW. 70K miles.
I'm getting a P13D3 code--#2 Glow Plug Implausible Signal.
I've replaced the GP relay and, when that didn't work, the #2 GP. Cleaned the connection under the boot, treated it with dielectric grease. Still getting the code.
I guess that leaves the wire. VW sells it separately from the harness. Part is 04L 971 785 C
Cheap enough, but I want to make sure I understand the concept.
It looks like it comes with enough wire to plug it in next to my toaster. I'm guessing that I'm supposed to unwrap this really nice bundle of wires that feed both injectors and glow plugs, find a likely place to splice in the wires, and solder it up.
Questions: Is that more or less correct? Should I assume the problem is at the GP end of the wire, and just find a convenient spot for the splice, or is there a more scientific way of doing this? And are there questions I should be asking but don't know enough yet to ask?
 

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Discussion Starter · #3 ·
I cleared the code one more time. When the light came back on, it was for #3. So I replaced all three remaining glow plugs. No problems since then. So I still haven't figured out how to replace the wire.
 
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