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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 08-27-2006, 07:13 PM   #1 (permalink)
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E30 check control relay

first off i have an E30 1986 325e, 4dr, auto, (prod 12/85)

i know there is a relay that controls the check control system. (the check control system being of course the little red lights above the rearview mirror). Yet i don't know where its at. I've seen the actual relay, its rectangular in shape and is stainless steel in color. does anybody know where on the car its located, any help would be greatly appreciated!

Last edited by 95bmw540i; 08-27-2006 at 07:23 PM.
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Old 08-27-2006, 09:00 PM   #2 (permalink)
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Sorry to tell you this, but there isn't a relay that controls it. It has it's own power supply that branches off of the turn signal power feed. So it gets it's power when you turn the key on. Other than that it has just the reverse feeds that kick the led on when a bulb blows, or when the hall effect in the low oil or low washer fluid trips the led. I know this first hand from removing the entire wireing harness from an 86 E30....
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