Sixto-
Thanks for responding-
I believe that I found the test connection (X11/4 - impulse readout, 8-pole). Am I correct?
Held button in for 2 seconds and received 1 flash.
LED was on when I turned key to #2 position. After I held it in for 2 seconds, it did go out and then the 1 flash.
If I press the button again - the LED stays on.
-John

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1993 190e 2.3
Spruce Green Metallic
62k original