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1991 740 w/o ABS, Brake Pressure Differential Switch? 700

posted by  jd620 on  Sun Nov 2 09:59 CST 2003
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last visit: Fri Oct 17 07:42 CST 2014
[RELATED]

I cannot find where the brake pressure switch electrical connection is, any clues?

I can find it on my old 1987 740. It is on the block just under the master cylinder on the wheel well.

The blocks (there are two) on the 1991 740 are in the same place but there are no electrical connections.

I am looking for it because the brake failure light comes on when no parking or headlights are on and the brake pedal is depressed. With the parking or headlights on and the brake pedal depressed there is no brake failure light. I know it is not the brake light failure relay because I have replaced it with 2 spares from my old 740s and they both act the same and there was no problem when I parked those old 740s for parts.

Thanks






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