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 K. Wiggins Your Own Question

K. Wiggins
K. Wiggins, ASE Certified Technician
Category: Car
Satisfied Customers: 1472
Experience:  Associates Degree
68360881
Type Your Car Question Here...
K. Wiggins is online now
A new question is answered every 9 seconds

Chevrolet Tracker 4x4: 2003 Chev Tracker, 4 cyl, 103k miles.

Resolved Question:

2003 Chev Tracker, 4 cyl, 103k miles. Just had alternator replaced. Drive home, turn off car and top relay (of two), under dash to the left of the steering wheel, near kick panel starts buzzing. Turn engine on, problem goes away. Turn off, starts buzzing. Lift hand brake, buzzing goes away for short while, but returns. Pull out relay, car will not start. Put relay back in, car starts fine - but above still prevails...
Submitted: 2 years ago.
Category: Car
Expert:  Michelle-Mod replied 2 years ago.


Hi, I’m a moderator for this topic and I wonder whether you’re still waiting for an answer. If you are, please let me know and I will do my best to find a Professional to assist you right away. If not, feel free to let me know and I will cancel this question for you. Thank you!


Expert:  K. Wiggins replied 2 years ago.
Does this vehicle have an aftermarket alarm or remote start kit? When reviewing the wiring schematics there are no relays that would inhibit starting.

Customer: replied 2 years ago.
No aftermarket systems that I am aware of. My mechanic is stymied by this as well. As he says, "...it must be a 'top secret' relay..." as he can not find it in any of the system specs or in the owner's manual. The relay appears to be original to the car as it is at the end of the fuse block that is inside the car next to the driver kick panel under the dash. With relay out, starter motor cranks but no ignition. Relay in, car starts fine and all systems are working. Turn off car and in a few seconds relay starts to, I guess best description - cycle rapidly - which causes it to vibrate and buzz loudly. I am referring to it now as the Relay from Hell. Both my mechanic and think it is an open ground - any help identifying the circuit this relay is on would be terrific.
Expert:  K. Wiggins replied 2 years ago.
Found it. They are the main and fuel pump relays. I'll post wiring diagram so you guys can check things out. If you need more assistance just let me know.

Customer: replied 2 years ago.
Yes, I found a schematic online last night that shows the main relay as the top and the fuel pump as the bottom relay. So now the big question, what might be causing that relay to open and close rapidly after the ignition is shut off (thus vibrating and buzzing loudly). What is on that circuit where we can look for a short. It sounds like an open ground. Would the changing of the Alternator have anything to do with it? I'm still with you on this....
Expert:  K. Wiggins replied 2 years ago.
I will look at the diagrams and post momentarily
Expert:  K. Wiggins replied 2 years ago.
Looking at the schematic heres how I would suggest testing the grounds.

The ecm controls these relays via ground. When the key is turn on the ECM ground the main relay to give power to the fuel pump relay and to send power to the injectors. The fuel pump relay is activated via the ecm supplying ground when it sees input from the oil pressure switch/crank sensor.

Testing wires for short to ground;


I would suggest testing for continuity between the wire at the relay and its corresponding pin at the ecm connector there should be continuity. If that checks there is no short to ground in the wiring harness and you need to check for ground on that terminal with both the key off and key on.

Testing main relay;

The main relay should only have ground when the key is on. Using ohm meter connect one probe to ground and the other probe to blue wire (pin 5) at the main relay connector. It should have no continuity to ground with the key off. If it pulses between continuity/no continuity the ecm is bad.

Testing fuel pump relay;

Ground should only be present on the white/green wire (pin 5) on the fuel pump relay for 3 to 5 seconds when key is first turned on, then constant when engine is cranking. If wire has ground at any time with key off and wiring has been confirmed to not be shorted to ground as in our first test the ecm is again suspect.



If I can assist further, please, let me know.
K. Wiggins, ASE Certified Technician
Category: Car
Satisfied Customers: 1472
Experience: Associates Degree
K. Wiggins and 16 other Car Specialists are ready to help you
Customer: replied 2 years ago.
My mechanic informed me that he found corrosion at the ground wire to the engine block (or somewhere there abouts). He cleaned and reconnected and problem seems to be resolved. More testing tomorrow morning when I go back for the car. I think that is in line with what you told me here. You did very thorough work here. Many thanks.
Expert:  K. Wiggins replied 2 years ago.
You are very welcome. I am not pleased until your vehicle is fixed. Hope you have a wonderful week end.
Customer: replied 2 years ago.
Well, both my mechanic and I thought we had it - but when i got home the relay started to buzz again. Very frustrating. There is a black device on the left fender just behind the window washer reservoir with a cable going to it from the firewall and an electrical connection. When the relay buzzes I lift the handbrake and the buzzing either intensifys or stops and the device mentioned above vibrates. Very strange...
Expert:  K. Wiggins replied 2 years ago.
Could you take a picture of the device? If you can upload it to

www.imgur.com

and post the link so I can see it, this is a strange one indeed.
Customer: replied 2 years ago.
You're earning your stipend on this one. Car is still at mechanic. If he does not resolve the problem, I'll send that photo. I think it is the electronic speedometer and also might control cruise control, that must be the cable coming out of it and into the firewall at the driver's side. LOL, just not sure what lifting the handbrake has to do with that device... Just for you satisfaction I will keep you posted. ,
Expert:  K. Wiggins replied 2 years ago.
Thanks! I really enjoy oddball/challenging issues. Have a good night my friend.
Customer: replied 2 years ago.
,Hello, been a while. Black box is cruise control. Mechanic was certain there was a short in the ignition switch. So we replaced that - OMG, still have the buzzing but less often. Frustration level now VERY high...

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