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  #1  
Old 11-14-2012, 09:33 PM
eatont9999's Avatar
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Parking Brake Light Flases Upon Acceleration 83 300SD

Hey fellas,

Here is a strange one. My parking brake light flashes when I accelerate moderately to hard. This is the red light by the way. I looked at the brake pads quickly and they look like they have meat on them. It would make more sense if this happened when braking but it only occurs upon acceleration. I am under the impression the low brake fluid light is displayed by the yellow light.

Where should I start?

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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge
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  #2  
Old 11-14-2012, 09:38 PM
vstech's Avatar
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you are under the wrong impression.
the low fluid light is the same as the light that lights up when the parking brake is on.
so, if you are low on fluid, but not below the minimum, hard acceleration could drop the fluid below the float trigger and light it up.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #3  
Old 11-14-2012, 11:14 PM
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could also be the switch at the parking brake; maybe it's a little loose, but definitely check your brake fluid level. the yellow light with the circle and hashmarks is for brake pad wear; once the pad gets down to about 1/4 material left it will light up
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1983 300SD (daily driver)
1991 420SEL (work in progress)
1979 300SD (future replacement for 83 SD)

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1983 300SD (totalled)
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  #4  
Old 11-15-2012, 12:52 AM
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Quote:
Originally Posted by vstech View Post
you are under the wrong impression.
the low fluid light is the same as the light that lights up when the parking brake is on.
so, if you are low on fluid, but not below the minimum, hard acceleration could drop the fluid below the float trigger and light it up.
After posting, I went out and added some brake fluid. I thought the same thing about the fluid sloshing around. It turns out that you were right and I was low on fluid. The good part is that I found the cause. The bad part is that I have a leak in the system somewhere. I think it is time to rebuild the whole braking system in the next 6 months. The brakes are OK but I do get a pull to the left when braking and that sounds like a sticking caliper. It is cheaper to rebuild all the calipers than to replace them, so that is probably what I will do.

Suggestions on brake pad brands? I am looking at semi-metallic pads. Also, how terrible is it to have the rotors turned if they are still within the .765" or so spec? I know the left front rotor has a lip on the rim and that is probably not a good thing.
__________________
1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge
Reply With Quote
  #5  
Old 11-15-2012, 12:54 AM
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Quote:
Originally Posted by shadetree77 View Post
could also be the switch at the parking brake; maybe it's a little loose, but definitely check your brake fluid level. the yellow light with the circle and hashmarks is for brake pad wear; once the pad gets down to about 1/4 material left it will light up
Thanks, good to know. I fiddled around with the parking brake and the light never went on, so I ruled that out first off. At least I know what light to look for when the pads get low.
__________________
1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge
Reply With Quote
  #6  
Old 11-15-2012, 05:58 AM
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if the rotors are that thin, just change them. they are not expensive, but are difficult to remove on some vehicles (123/126) turning them removes a lot of material, and weakens them and it's nearly the same price just to replace them!

Quote:
Originally Posted by eatont9999 View Post
After posting, I went out and added some brake fluid. I thought the same thing about the fluid sloshing around. It turns out that you were right and I was low on fluid. The good part is that I found the cause. The bad part is that I have a leak in the system somewhere. I think it is time to rebuild the whole braking system in the next 6 months. The brakes are OK but I do get a pull to the left when braking and that sounds like a sticking caliper. It is cheaper to rebuild all the calipers than to replace them, so that is probably what I will do.

Suggestions on brake pad brands? I am looking at semi-metallic pads. Also, how terrible is it to have the rotors turned if they are still within the .765" or so spec? I know the left front rotor has a lip on the rim and that is probably not a good thing.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #7  
Old 11-15-2012, 12:07 PM
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Looking at caliper rebuild kits, I see one for ATE and one for Bendix. How do I tell which I need? Is this something that I need to look at the part number on the caliper to find? Or is it something more obvious? I'm also assuming that any rotors sold on fast lane are good quality. I'll probably go with ATE, especially if my calipers are ATE as well.
__________________
1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge
Reply With Quote
  #8  
Old 11-15-2012, 12:40 PM
vstech's Avatar
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you need to look at your calipers and determine which you have and order the kit for your brand.
it'll say bendix on them if they are bendix, I don't think ATE is as obvious. also, bendix uses retaining clip pins ate they just push out.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #9  
Old 11-15-2012, 02:03 PM
eatont9999's Avatar
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Quote:
Originally Posted by vstech View Post
you need to look at your calipers and determine which you have and order the kit for your brand.
it'll say bendix on them if they are bendix, I don't think ATE is as obvious. also, bendix uses retaining clip pins ate they just push out.
OK, thanks. I'll stick my head under there and see what I see and say what I saw. Then I will saw what I said and make a liar out of myself.
__________________
1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge
Reply With Quote
  #10  
Old 11-15-2012, 02:42 PM
toomany MBZ's Avatar
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ATE and Bendix have different pad retaining springs for the fronts, both use pins, have a look.
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Parking Brake Light Flases Upon Acceleration 83 300SD-screen-shot-2012-11-15-2.40.27-pm.jpg  
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  #11  
Old 11-15-2012, 06:39 PM
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I can't see the calipers well enough with the wheels on. I'm going to have to take each wheel off to inspect the calipers in case one is different. Last thing I want is to assume something and have a brake rebuild project turn into a SNAFU.

My parts list:

4x Brake Disc Set Screw
2x Front Rotors
4x Brake Pad Wear Sensors
1x Set of Front Pads
1x Set of Rear Pads
1x Parking Brake Shoe Kit
2x Brake Fluid Reservoir Grommet
2x BFR Float Caps
2x Front Brake Hose
2x Rear Brake Hose
2x Front Brake Caliper Rebuild Kit
2x Rear brake Caliper Rebuild Kit

Pending inspection of rear rotors, can you guys think of anything else? My Master Cylinder seems to be fine but I will inspect it for leaks when I have daylight.
__________________
1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge
Reply With Quote
  #12  
Old 11-20-2012, 01:24 AM
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Location: Dallas, TX
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After further inspection, I have 4 ATE calipers judging by the lack of Bendix logos and the clips only used by ATE.
__________________
1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge
Reply With Quote
  #13  
Old 11-20-2012, 08:25 AM
vstech's Avatar
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Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,389
when you say clips... do you mean springs?
only Bendix uses clips on the pins.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #14  
Old 11-20-2012, 10:25 AM
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In the picture above, they had the cross-looking part on the right. This was looking at the back of the caliper closest to the wheel rim.
__________________
1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge
Reply With Quote
  #15  
Old 11-20-2012, 12:46 PM
vstech's Avatar
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Location: Mount Holly, NC
Posts: 26,389
yup. ate then.

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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