AC / Anti-lock brake light issue

Discussion in 'Engine & Drivetrain' started by CWARE, Jun 16, 2019.

  1. CWARE

    CWARE Member

    Posts:
    82
    Likes Received:
    28
    Joined:
    Jul 29, 2010
    Location:
    Norman,Ok
    Name:
    Cameron
    When I got my 2 door 95 Tahoe 4wd the AC panel worked when it wanted to and I soon replaced it with a new panel as I read the stock 95 panels had many issues. The AC worked fine afterwards until last week. My wife was driving it and told me the AC had stopped working with no blower sound or air (hot or cold) coming from the vents. Later that day I checked it out hoping it was a fuse or something simple and no luck. All fuses looked fine. I then noticed that the ABS light was on in the dash. I remembered that months ago (can’t recall if it was before or after the new panel went in) the AC panel did the same thing and that the ABS light was on then also. I thought there was no way the two could be related but the next day the light was off and the AC panel worked fine.

    I did some searching on the ABS light and saw some saying it could of course be the controller and some saying it could be a speed sensor at one of the wheels. Has anyone had this issue with the ABS light and AC panel being connected in some way or is this just one heck of a coincidence in my situation? Any help would be appreciated. Thanks.


    Sent from my iPhone using Tapatalk
     
  2. Big Mama

    Big Mama Full Access Member

    Posts:
    1,579
    Likes Received:
    556
    Joined:
    Jul 21, 2015
    Location:
    Virginia
    Name:
    Steven
    Can you read the abs code?
     
  3. CWARE

    CWARE Member

    Posts:
    82
    Likes Received:
    28
    Joined:
    Jul 29, 2010
    Location:
    Norman,Ok
    Name:
    Cameron
    I don’t have a scanner capable of running an OBD1 system.


    Sent from my iPhone using Tapatalk
     
  4. Big Mama

    Big Mama Full Access Member

    Posts:
    1,579
    Likes Received:
    556
    Joined:
    Jul 21, 2015
    Location:
    Virginia
    Name:
    Steven
  5. swathdiver

    swathdiver Full Access Member

    Posts:
    8,749
    Likes Received:
    7,349
    Joined:
    May 18, 2017
    Location:
    Treasure Coast, Florida
    Name:
    James
    Sorry, I'm not familiar with those. But a bi-directional scan tool is essential to properly diagnose and fix it without throwing parts at it.
     
  6. TheAutumnWind

    TheAutumnWind Full Access Member

    Posts:
    2,732
    Likes Received:
    1,279
    Joined:
    Jan 8, 2015
    Name:
    Chris
    You can pull obd1 codes with a paper clip or an aldl cable and a laptop
     
    Big Mama likes this.
  7. CWARE

    CWARE Member

    Posts:
    82
    Likes Received:
    28
    Joined:
    Jul 29, 2010
    Location:
    Norman,Ok
    Name:
    Cameron
    I’m familiar with the method of pulling an OBD1 code using the paper clip or code key but will there be a code to read if the actual check engine light isn’t on?


    Sent from my iPhone using Tapatalk
     
  8. TheAutumnWind

    TheAutumnWind Full Access Member

    Posts:
    2,732
    Likes Received:
    1,279
    Joined:
    Jan 8, 2015
    Name:
    Chris
    Is your abs rear wheel only?
     
  9. TheAutumnWind

    TheAutumnWind Full Access Member

    Posts:
    2,732
    Likes Received:
    1,279
    Joined:
    Jan 8, 2015
    Name:
    Chris
     
  10. TheAutumnWind

    TheAutumnWind Full Access Member

    Posts:
    2,732
    Likes Received:
    1,279
    Joined:
    Jan 8, 2015
    Name:
    Chris
    You can try unplugging the abs box for a day or so and see if it resets. Or just delete ABS altogether which alot of people do on the Rear wheel only abs trucks.

    If you have an abs light there is likely an abs code. WHy would you need to "check engine" if there is nothing wrong with the engine?

    OBD-I ABS codes:
    Code 21: right front speed sensor or circuit open
    Code 22: missing right front speed signal
    Code 23: erratic right front speed signal
    Code 25: left front speed sensor or circuit open
    Code 26: missing left front speed signal
    Code 27: erratic left front speed signal
    Code 29: simultaneous drop out of front speed sensors
    Code 35: vehicle speed sensor or open circuit
    Code 36: missing vehicle speed sensor signal
    Code 37: erratic vehicle speed sensor signal
    Code 38: wheel speed error
    Codes 41 through 54: control valves
    Codes 61 through 63: reset switches
    Codes 65 & 66: open or shorted pump motor relay
    Code 67: open motor circuit or shorted BPMV output
    Code 68: locked motor or shorted motor circuit
    Codes 71 through 74: memory errors
    Code 81: brake switch circuit shorted or open
    Code 86: shorted abs indicator lamp
    Code 87: shorted brake warning lamp
     
    Last edited: Jun 18, 2019

Share This Page