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Old 08-14-2014, 08:58 AM   #1
88e30vert
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Brake fluid level switch

I don't think my level switch is working. The fluid reservoir was empty and I didn't get a light on the dash and also when I unplug the switch I still don't get a code. Shouldn't I get a light that comes on when I unplug the level switch?
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Old 08-14-2014, 09:08 AM   #2
Ceeker
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took this off the internet: should be generic.

Brake Fluid Level Switch Test

Check for continuity between the terminals (1) and (2) with the float in the down position and in the up position.

NOTE:

Remove the brake fluid completely from the reservoir. With the float down, there should be continuity.
Fill the reservoir with brake fluid to the MAX (upper) level (A). With the float up, there should be no continuity.

I'd just ignore what's below.

If both the ABS/VSA indicator and the brake system indicator come on at same time, check the ABS or VSA first: ABS, VSA.
If the parking brake switch and fluid level switch are OK, but brake system indicator does not function, check the ABS or VSA: ABS, VSA.
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latest addition 1 89-325i vert - white -fixin/sold
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Old 08-14-2014, 09:38 AM   #3
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So after a quick inspection I figured out I could remove a little cover on top of the sensor to look at the leads, and they were corroded



After a little cleaning it worked flawlessly
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Old 08-18-2014, 10:39 AM   #4
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Separate question but I didn't want to open a new thread. I ended up findind a leak in the rear somewhere around the rear subframe. Could I plug the line with a bolt at the master cylinder so just the front brakes work or should I call a tow truck to move it
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Old 08-18-2014, 10:49 AM   #5
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you could still drive it. I drove without rear brakes for months.. you just gotta give yourself plenty of distance when braking...

as for the repair...I've done two of those..real bitch to get at.. You can drop the subframe a inch or so to make room. it is most likely the junction where the lines comes together. it's a small line that often rots. replace that and you're good to go if you're up to it and the others are also crusty change them as well.
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I think I've had 14 bmw's in 4 years.
2 IX's -sold and parts
2 325i 4 dr - sold
4 318is all white - sold and parts
1 87 325is red - parts
1 89 325i vert grey - parts
1 90 325is white - keepin
1 87 325i vert -red - keepin
latest addition 1 88-325is red - parts
latest addition 1 89-325i vert - white -fixin/sold
latest addition 1 92-318i vert - blue - parts
latest addition 1 87 325is blk - parts.

latest addition as of 2013-Gold 87-325is auto! it's a keeper!
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Old 08-18-2014, 11:06 AM   #6
88e30vert
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I'm just worried about running out of fluid and my clutch not working. Does the clutch use the same system?
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Old 08-18-2014, 12:38 PM   #7
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yes it piggybacks off it...my experience is the rear section of the resovior runs out first. well it's totally up to you. you can always CAA.
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I think I've had 14 bmw's in 4 years.
2 IX's -sold and parts
2 325i 4 dr - sold
4 318is all white - sold and parts
1 87 325is red - parts
1 89 325i vert grey - parts
1 90 325is white - keepin
1 87 325i vert -red - keepin
latest addition 1 88-325is red - parts
latest addition 1 89-325i vert - white -fixin/sold
latest addition 1 92-318i vert - blue - parts
latest addition 1 87 325is blk - parts.

latest addition as of 2013-Gold 87-325is auto! it's a keeper!
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Old 08-19-2014, 10:32 AM   #8
cirrusblau
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Clutch should be fine short term, so long as the clutch circuit isn't leaking. I believe the clutch only needs more fluid as the clutch disk wears, and the wear won't be much with just a bit of driving.

Front and rear circuits are seperate but draw fluid from the same reservoir. You'll still have brakes, but depending on the severity of the leak, perhaps not as good, not as balanced and perhaps not for many actuations.

How bad is the leak? You might be able to use the brakes normally for a day with a fluid top-off. Whatever you do though, make sure you know exactly what you're doing. It goes without saying how important the brakes are!
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Old 08-19-2014, 12:17 PM   #9
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Thanks. I'm only gonna drive it about 15km to a buddy house to get fixed( he's got a hoist ) but it leaks out almost all the fluid after about 15min. Just want to make sure I wasn't gonna do anymore damage.
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