Senfrelais ohne Senf drin

[Erich]

Ein paar weitere Kommentare hier kopiert:

Das Senfrelais ist stark vom Baujahr abhängig (bestückt bis leer oder gar nicht vorhanden).

aus englischen Forum:
61311378052 7-pins relay, A1, A2, A3, A4, E1, E2, 31 used with LKM-L for cold and warm light checking parking light and taillight
( = also das wirkliche Senfrelais)

61311378525 connector parking light, only used in e32 730iM30 and some E34 with LKM-B for warm light checking = when lights are switched on , 6-pins: A1, A2, A3, A4, E1, E2, NOT 31 = ground is missing = Masse fehlt
( = also leeres Relais nur mit Bruecke)

Mustard Relay is K7 Parking Light Monitor Relay page 6314-00.
31 = pin 7, Ground, E1, E2 = pins 4 and 6, 12V switched by light switch S8, A1, A2, A3, A4 = pins 2, 5, 6, 9 which are Normally Open relay contacts. These lines feed through A3 LKM to power the Front and Rear Park Lights E15, E16, E17, E19.

The function of K7 is a bit obscure - it opens (floats) the circuits to A3 X12 pins 7, 26, 27 and 28 when the light switch S8 is OFF. This must assist the A3 functionality.
In the latter years, BMW simply deleted K7 and powered A3 X12 pins 7, 26, 27 and 28 directly from the light switch S8! So K7 Mustard was just a bad idea.