Troubleshooting Anti-Lock Brakes on 04 Dakota | Expert Tips

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Discussion Overview

The discussion revolves around troubleshooting the anti-lock braking system (ABS) on a 2004 Dodge Dakota pickup truck. Participants explore the performance of the ABS under various conditions, the design implications of driving an unloaded truck, and the subjective experience of braking effectiveness. The conversation includes technical explanations, personal experiences, and suggestions for testing and modifying the braking system.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Exploratory

Main Points Raised

  • One participant describes feeling like they are "sliding on ice" when the ABS engages and questions whether the system is functioning properly or poorly designed.
  • Another participant suggests that the lack of weight in the truck may cause the rear brakes to lift off the ground during braking, leading to ineffective ABS operation.
  • A later reply clarifies that the truck is always loaded, disputing the notion that the rear wheels leave the ground.
  • Some participants explain that ABS works by preventing wheel lock-up, but its effectiveness may be compromised if the wheels are unweighted or if the driver does not maintain steady pressure on the brake pedal.
  • Concerns are raised about the safety of pulling the ABS fuse, with warnings that it may disable other critical systems.
  • One participant suggests conducting brake tests in a safe environment to evaluate the ABS performance under controlled conditions.
  • Questions are posed regarding the consistency of ABS performance across different road conditions and the effectiveness of the system in preventing wheel lock-up.
  • Another participant raises a separate question about the positioning of brake calipers on different vehicles and their impact on braking dynamics.

Areas of Agreement / Disagreement

Participants express differing views on the effectiveness and design of the ABS in the Dakota, with no consensus reached on whether the system is functioning correctly or if it requires modification. Some participants advocate for testing and careful driving practices, while others express skepticism about the ABS technology itself.

Contextual Notes

Participants mention various assumptions about vehicle weight, driving conditions, and personal experiences with braking, which may influence their perspectives. The discussion includes unresolved questions about the specific performance of the ABS under different scenarios.

  • #31
Mech_Engineer said:
Based on your symptoms and the fact that you have only rear-wheel ABS, it is my suspicion that your rear brake proportioning valve is adjusted incorrectly. If your proportioning valve isn't working correctly and is sending to much brake pressure to the rear wheels, it is possible the ABS system will unintentionally limit the braking force to your front wheels as well. I would suggest having your proportioning valve inspected by either the dealer or a reputable shop.

If the P valve is adjusted wrong would the brakes act so well with the ABS fuse pulled?
 
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  • #32
Danger said:
I hated ABS until W bought our (her :rolleyes:) Grand Am a few months ago. They're almost unnoticeable under normal conditions, as opposed to that 'chattering' crap that the earlier systems inflicted. That just drove me apegarbage.
The only thing that bothers me about it now is that it still stands as a buffer between me and the vehicle. As with an aeroplane, I like to wear a car as an extension of my body. Every computerized interception of that symbiosis is irritating. Sometimes, I want my brakes to lock. A silicon 'brain' getting in the way of that is a pain in the ass.

edit: Evo, the censor still isn't working.

As a rule I would rather have a computer take care of the work. I have a lot of faith in their ability to hash out the variables at lightning speed. This, suspect, is just bad design...but let's see.
 
  • #33
TVP45 said:
Did you do what many pickup drivers do and put different tires on the rear? Even a small difference really screws up ABS.

Tires identical
 
  • #34
Then there's nothing else to do but call the Car Talk guys.
 
  • #35
mtworkowski@o said:
As a rule I would rather have a computer take care of the work. I have a lot of faith in their ability to hash out the variables at lightning speed.

I can fully understand that, but remember that I started driving before seatbelts were available as an option. Some of we old folks still like to do things for ourselves, and in some cases can do it better than a computer. I've been in a couple of situations where locking my brakes saved my life. I'm not sure that I would have died if a computer had been driving, but I know that I didn't because I had control.
 
  • #36
Danger,
Did you think you were talking to a kid? I'm up there too. Also, I'm not thinking that locked up brakes are the way to stop fast. But I think ABS could be the worst. I opt for air bags on the front bumper and a complete rethink on the ABS deal. Suspension as a whole is interesting to me. I think basically It's from the stone age. The shock absorber has to be the most misunderstood thing in the world. The whole thing is quite interesting.
 
  • #37
TVP45 said:
Then there's nothing else to do but call the Car Talk guys.

You know, that's a good idea. I listen to those maniacs every Saturday. I should make them work for a living. Thank you TVP45.
 
  • #38
mtworkowski@o said:
Danger,
Did you think you were talking to a kid?.

No offense intended, pal; most people on this site are much younger, and something about your posts indicated that you were in that group. So if you happen to have a picture that isn't engraved on a stone tablet, how about you post it in the Users Photos thread so I know what I'm dealing with? :-p
 
  • #39
Danger said:
No offense intended, pal; most people on this site are much younger, and something about your posts indicated that you were in that group. So if you happen to have a picture that isn't engraved on a stone tablet, how about you post it in the Users Photos thread so I know what I'm dealing with? :-p

this is the best picture I could find. I hope it's OK.
 
Last edited:
  • #40
mtworkowski@o said:
You know, that's a good idea. I listen to those maniacs every Saturday. I should make them work for a living. Thank you TVP45.

BTW, they're coming to PBS TV soon. I missed the exact date since the ad featured a huge mound of maggots and Tom seemed to be comparing Ray to the maggots? Only Click and Clack would think of doing that.
 
  • #41
Danger said:
I can fully understand that, but remember that I started driving before seatbelts were available as an option. Some of we old folks still like to do things for ourselves, and in some cases can do it better than a computer. I've been in a couple of situations where locking my brakes saved my life. I'm not sure that I would have died if a computer had been driving, but I know that I didn't because I had control.
I was in an accident where I rear-ended someone in the rain. ABS probably would have helped prevent it, as I tried unsuccessfully to swerve around the other car, with my locked-up wheels.
 
  • #42
I agree that ABS is good for a situation where maximum stopping effectiveness (threshold braking) is desired. When I find the lock-up desirable is during some extreme manoeuvring.
 

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