ABS problem. 98 STS

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 2 of 2
Suspension, Brakes and Tires Discussion, ABS problem. 98 STS in Item Specific Cadillac Discussion; I have been getting a code "C1242 - Pump Motor Circuit Open" It comes on randomly and when i clear ...
  1. #1
    jcdsog is offline Cadillac Owners Member
    Join Date
    Oct 2003

    ABS problem. 98 STS

    I have been getting a code "C1242 - Pump Motor Circuit Open" It comes on randomly and when i clear it it stays off for a while normally. I was wonderin where this problem could be originating. I read in another forum that it could be a bad wire or harness. I have located the brake valves in the lower part of the engine compartment and will check the connections there. I was wondering where the other side of the harness will plug into. An ABS control module i would imagine.

    Whats weird is that it only started coming on after i had my tires balanced. Im thinking a wire may have been pinched because of that. Does anyone know if the wires are ran under the car or throught the firewall and inside?

    Thanks for all the help.

  2. Remove Advertisements

  3. #2
    Krashed989's Avatar
    Krashed989 is offline Cadillac Owners Connoisseur
    Automobile(s): 94 Eldorado, and a 99 ETC
    Join Date
    Sep 2004
    Hilo, Hawaii

    Re: ABS problem. 98 STS

    What you found was the EBTCM (Electronic Brake and Traction Control Module). It serves both purposes of ABS module and TCS module (mainly because they both need data from the same sensors). Built into the EBTCM is the ABS pump, which obviously from the code definition has an open circut. The wires that go into the EBTCM can be followed going underneath the fuse box and then into the firewall to the IPC module, but a lot of them split off and go to sensors such as the wheel speed sensors. Wiring problems are a bit tricky to diagnose. So get your voltmeter and ohmmeter fired up. Good luck.

    Hope this helps.

  4. Remove Advertisements
    Cadillac Forums

+ Reply to Thread
Gear in this thread - Powered by O'Reilly Auto Parts

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)

Your date of birth and age are displayed in several places on the forum. Only the administrator will have access to your date of birth should you choose to hide it via the privacy option below.


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts