my1994z28

This just happened today,I was driving along and I looked down to see that the ABS INOP light was on..I scanned it and it says that the brake is on?Any ideas on what could be wrong?I thought about deleting the ABS unit anyway because the car is never driven in the rain or snow,also it would free up a few pounds..

Injuneer

Do you mean the "BRAKE" light is on? If the e-brake is not on, that indicates a pressure imbalance between the front and rear braking hydraulics, due to a leak, air in system, master cylinder pressure problems, etc. That would explain why the EBCM turned off the ABS.

Moving to "Suspension, Chassis and Brakes".

my1994z28

It lights up and says ABS INOP,I bled all four corners last night and it is still on,replaced the relay,and the 2 fuses for the ABS.I thought it was due to having air still in the brake lines,the brakes are definetly alot better.The light is still on.

Injuneer

What did you mean by this?

"I scanned it and it says that the brake is on?"

Is this based on an ABS code? My EBCM code list does not have a code that says "the brake is on".

There is a PCM code for "brake switch stuck on".

my1994z28

I am unable to get the actual code number again,When I first scanned it PO@#$ showed up followed by "brake is on".....It is not throwing any more codes,but the ABS INOP is still on..I am going to try and clean the ABS sensor in the rear end tomorrow and see if that is the problem.

Injuneer

But what did you scan - the PCM or the ABS controller (EBCM)?

The brake light switch, on the pedal, is an input to both the PCM and the ABS. If the switch is stuck "on", that would probably cause the ABS to stop working.

my1994z28

I scanned the PCM

Injuneer

Then check the switch.

Guest47904

If the unit thought the switch was on all the time wouldn't the brake lights be on ?

Injuneer

I would agree, but he says he has a PCM code for the "brake stuck on", and since there is no code for that, I'm guessing it's for the "brake switch stuck on".

Guest47904

Does he mean he actually saw a code 37 and it did NOT actually say to him "stuck on".

Do you suppose his third brake light is out and that's why he has an "ABS INOP" lit?

Or is to coincidental that the brake switch is on and the ABS INOP is on?????

The Action described for a 37 does NOT describe an ABS INOP light.

In the ABS section of the manual, it describes a DTC 94 for brake switch always closed. However the action taken for this is to NOT disable the ABS.

I think the young padawan is mistaken and very confused. Take it to someone with a good scanner and knows how to read it.

my1994z28

I am 37 yrs old...I have a mac scanner,I dont remember the code number off hand,but it did say "brake is on"..my third brake light is working,now that you mention it,the ABS INOP came on when I installed my SS spoiler,the plugs matched up so I did not think anything of that until now.I did not have the time today to clean the ABS sensor on the rear end or check the brake switch out..I will do that for sure tomorrow and report back.

Injuneer

Correcting problems with the SS LED CHMSL, courtesy of Shoebox:

http://shbox.com/1/relay_for_ss_spoiler.jpg

That is most likely your problem.

my1994z28

Thanks Fred,thats what I needed to see