How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Marc Your Own Question

Marc
Marc, Technician
Category: Car
Satisfied Customers: 1888
Experience:  33 years exp. automotive repair NYS emisisions repair cert.
44459
Type Your Car Question Here...
Marc is online now
A new question is answered every 9 seconds

99 ford ranger: 0 my abs light turned..light started..ride..drove

Customer Question

I was driving to work today in my 99 ford ranger. My speedometor droped to 0 my abs light turned on and then the overdrive light started blinking. The rest of the ride the truck was bucking between drive and overdrive so I drove it in 2nd the rest of the way
Submitted: 6 years ago.
Category: Car
Expert:  Marc replied 6 years ago.

The DSS circuits run through connector C309, located under the driver seat area above the transfer case that is known for water contamination and corrosion problems.

The DSS (Differential Speed Sensor) is also a common problem it is located in the top of the rear end housing.

Check resistance of the Differential Speed Sensor (DSS). Resistance should indicate a reading of approximately 1400 ohms.

If resistance is OK, check the DSS circuits between the 4WABS module and the DSS for a potential open or short to ground in the harness. Check sensor resistance from the 4WABS module between the Red/Pink (RD/PK) wire at pin 21 and the Light Green/Black (LG/BK) wire at pin 22 to verify that the resistance of the circuits and sensor is the same as the value right at the sensor.

If the 4WABS module self-test does not indicate any service codes, check the output signal from the 4WABS module on the Grey/Black (GY/BK) wire at pin 19 which feeds the PCM, speed control servo, cluster and Generic Electronic Module (GEM). Expect this circuit to indicate an AC square wave signal with the rear wheels spinning.

If the circuit shows a signal as described, check the GY/BK wire for an open circuit.

If the GY/BK does not show a pattern with the 4WABS module connected, check the GY/BK for a potential short to ground in the harness and replace the 4WABS module if it is OK

Marc, Technician
Category: Car
Satisfied Customers: 1888
Experience: 33 years exp. automotive repair NYS emisisions repair cert.
Marc and 8 other Car Specialists are ready to help you
Customer: replied 6 years ago.
I am not in any way mechanicly literate. So i just need to know when i take it to the dealership is it going to cost me my left arm or is it reasonable. I am going to except however because I will atleast know what they are suppose to be checking now. Thanks
Expert:  Marc replied 6 years ago.

If it is just the speed sensor they are fairly cheap but taking to the dealer is going to cost a lot more then an independent repair shop.

Print this answer and bring it with you to repair shop and they can give you an estimate based on the progression of the diagnosis, (how far down the list they have to go to solve your problem).

Customer: replied 6 years ago.
Will do. Thanks a lot.
Expert:  Marc replied 6 years ago.

If you need further assistance please post back

Regards Marc

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
< Last | Next >
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles Walnut Creek, CA
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue Charleston, WV
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim Castleberry, FL
  • Excellent reply, and also very quick. Really sounds like the Expert knows what he is talking about. I will be back to use your service when I need more help with my RV. Dutch USA
 
 
 

Meet The Experts:

 
 
 
  • Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
  • http://ww2.justanswer.com/uploads/TE/TedG/2012-6-15_14759_avaLarge.64x64.jpg Ted G.'s Avatar

    Ted G.

    ASE Certified Technician

    Satisfied Customers:

    1596
    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    1311
    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    ASE Master Tech

    Satisfied Customers:

    2367
    ASE Master Tech advanced level specialist
  • http://ww2.justanswer.com/uploads/SU/supermechanic/2013-8-23_03546_500.64x64.jpg Jerry's Avatar

    Jerry

    Master Mechanic

    Satisfied Customers:

    1906
    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    942
    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes
  • http://ww2.justanswer.com/uploads/ST/Steve7654/2012-6-5_215929_japic800x660.64x64.jpg Steve's Avatar

    Steve

    Auto Service Technician

    Satisfied Customers:

    1980
    25+ yrs experience as a professional working technician; ASE L1 master technician