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solved the no fire mystery on my 85 240dl 200 1985

"But you are correct, it can't be the wire that grounds the coil, as the car still turns off as normal."

Corey,

The wire that connects to Coil terminal #1 has nothing to do with turning the car off "as normal". It's basic to the spark generation process. But it will prevent the car from starting if disconnected (or cut).

The normal "turning off" is done by blocking the + voltage to the other coil terminal—the blue wire(s) at terminal #15.

And I'm still baffled, because I have wiring diagrams, and they show no white wire at the Ignition module. I believe the only shielded wire at the module is the "light gray" one going to Coil terminal #1. I'll check when the '87 240 gets back later.

Anyhow, I think we're talking about the same wire, but how your car can run with it cut is a mystery to me.

--
Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.






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