My KLIMA relay would never work, so I ended up removing that and replacing with a work-around relay that restored AC compressor function. I also had the rough idle from EDS/ELR. I really need to try your fix and see if I can restore the whole system to operation. My engine wiring harness is looking rather poorly, with a big of insulation flaking off because it has gotten brittle and cracked when flexed, so I'd attributed my issues to that. Now I need to try this fix.

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Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC