Should the power-in to the glow relay (the big black wire to the bolted terminal) and 80A strip fuse have juice with the ignition in the OFF position?

I got 11.36v with the ignition off, but almost nothing once the car was started.

Tks and Merry Christmas.

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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22