1990 C1500 ABS (RWAL) removal.

[Not An SS]

Anyone done this on an 8 lug/2500?

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[Moparmat2000]

I chased soft pedal issues and a brake warning light constantly lit from a hard assed panic stop about a month and a half ago. Changed new master cylinder twice thinking the first replacement master was faulty since it did not correct the problem. Front n rear brakes were redone about 6 months prior to this issue. Bled damn near 2 quarts of fluid thru the system.

Finally i decided to just disconnect RWAL line from the proportioning valve and directly hook brake line up bypassing it altogether. I got my old brake pedal feel back. A hard, high, normal feeling pedal, and great stopping. I then removed the RWAL box, and solenoid. Tucked the RWAL plug into my trucks harness to get it out of the way, and cut the RWAL mounting tabs off the proportioning valve mount. Time to drop this horse **** in the scrap bucket. Prob the best mod i made next to the Jeep shaft mod. Cleans up that part of the engine bay rather nicely too, and a bonus my brake fluid is now super clean.

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[mars2878]

I chased soft pedal issues and a brake warning light constantly lit from a hard assed panic stop about a month and a half ago. Changed new master cylinder twice thinking the first relacement was faulty since it did not correct the problem. Front n rear brakes were redone about 6 months prior to this issue. Bled damn near 2 quarts of fluid thru the system.

Finally i decided to just disconnect RWAL line from the proportioning valve and directly hook brake line up bypassing it altogether. I got my old brake pedal feel back. A hard, high, normal feeling pedal, and great stopping. I then removed the RWAL box, and solenoid. Tucked the RWAL plug into my trucks harness to get it out of the way, and cut the RWAL mounting tabs off the proportioning valve mount. Time to drop this horse **** in the scrap bucket. Prob the best mod i made next to the Jeep shaft mod. Cleans up that part of the engine bay rather nicely too, and a bonus my brake fluid is now super clean.

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Looks so much cleaner

 

[Moparmat2000]

Works great, i definitely recommend. Not a big fan of ABS anyways. I'm going to get into it a little bit further later on and dewire that plug out of the harness

 

[Moparmat2000]

A buddy of mine has a 1988 model. He needed the adaptor fitting for his line. Thank you to the OP for that information.

 

[iNFiNiTY125]

Great write up!

I recently did this to my truck, the ABS light was on and I narrowed it down to the solenoid unit. I decided to bypass the ABS, and I am very happy with the results. The truck stops way better than it did even when the ABS worked the pedal is so nice and firm. I also replaced the master cylinder and booster since they were both leaking. I can finally confidently stop my truck! I have the 91 K2500 with the JB6 brakes I didn’t need the adaptor and removing the RWAL unit turned off the annoying brake light. I kept the sensor on the combo valve for low fluid everything is good now, thanks!

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[bobby v]

OK 3 questions if you please
How much fluid can I expect to come out when disconnecting the lines ????????
Does the line that gets moved from the dump valve to the Porportioning valve move over there easily or do I have to worry about it bending ??
What do you do with the electrical plugs, just tape them off or do they plug in somewhere else ???
Think I'll try this my self
Thanks for you reply
Bobby V
PS What Id give for an active truck forums, Im on the Corvette forums and Id have lots of answers about this just ovrnite, some good and some bad but at least theres answered. COMEONGUYS lets get this forum rocking as they say

 

[77Impala]

You will lose very little fluid.
The line move fine. Just a little stretch of the coiled, nothing drastic.
I cut the wires going to the ABS controller, staggering their lengths. Then tucked them in side the loom.

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[bobby v]

Thank you 77Impala, I appreciate the reply and its on my list to do, right after I get this damned TBI to idle down, frustrating
Do you think I will need to bleed the rear brakes ??
Bobby V

 

[77Impala]

May not need to. I did not on mine.

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