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#1
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dash break light
ive done several searches for my question but havent found an answer. My red break light, next to the break sensor light on my dash will not shut off (yes the parking break is not on). it started last week while driving in rain. its on in the morning until my car is up to about 80c temp and will stay on for the rest of the day. i thought maybe something got wet because of the rain but its been doing the same thing during both wet and dry days. any ideas?
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#2
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In some models that warning light is also used by the master cylinder fluid level sensor and the brake pad thickness sensors.
Sixto 87 300SDL |
#3
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thanks. i have an 82 300d turbo diesel.
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#4
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red light is fluid level in the master cylinder...the yellow is the pad sensors..in both the W116 and W123 models I have.
__________________
Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche |
#5
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Check brake fluid level first.
If that's good, check to make sure that the return spring on the parking brake pedal is pulling it all the way up to engage the switch.
__________________
1971 220D/4-speed ~250K mi. Family owned (dads side) through three generations since <5K miles. 1992 Chrysler LeBaron, 3.0V6 125K. Family owned (moms side) through three generations since new. 1977 Chevy Camaro Continual hotrod project 1970 Cadillac Sedan DeVille 472ci and nearly 19' long 1974 Fiat Spider Still needs work |
#6
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Floppy parking brake pedal is by far the most common cause of this light staying on. It does on our 83, mine is firm and good though.
__________________
-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#7
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the level seems fine. should i pump the resevoir pump? would that help?
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#8
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There are two separate reservoirs in the brake fluid container. Are you sure that both of them are full?
Len |
#9
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Both of mine are full. If there is a switch for the E brake, I'm gonna check that this weekend. Mine still stops fine, just has this annoying red light..
The only other thing I can think of is when I was replacing the air cleaner mounts, I leaned on the m/c (not on purpose), maybe I bent a prong on the connector? |
#10
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yep, both of my resevoirs are full. i pumped it a few times to see what would happend and it did nothing. the break light is still on. actually all 3 of my lights stay on when i start the car up (battery, sensor and parking break) and the battery and sensor turn off when i put the car in drive but if i let it idle they stay on. i dont remember if that did that before when i started the car or if that just started recently.
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#11
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Sounds like an electrical issue a brewin'. Alternator/regulator....or possibly a grounding issue.
__________________
-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#12
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Quote:
any ideas on how to check it? i thought those lights werent supposed to stay on that long. like i said this started during heavy rain...maybe something got wet? |
#13
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ok i did some research on the altenator and how to check it and everything came back ok. the battery read 12v off and 13.5v w the engine at 1500rpm. i cleaned and checked my battery connections and they appeared to be fine.
i double checked the haines manual and it said the light comes on to indicate the reservior tank pumps are in working order....when pumped. so i pumped it a few times and i managed to get the light to go out for a little bit but within 2 minutes it was back on. |
#14
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Quote:
__________________
Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche |
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