Question about Mazda MAZDA3

1 Answer

HELP stuck relay in PJB

Mazda dealers tell me that in the Passenger Junction box a stuck relay in close is causing my car to not start on occassion. They also recommend replacing the entire box... can anyone advise - can you i simply replace the relay??? where, other than the dealer can i get the box programmed?

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  • Ani Rosa
    Ani Rosa Mar 22, 2014

    they recommended replace entire PJB for over $1k. its located under the glove box, passenger side. They state, "internal failure relay stuck closed causing draw on battery"

  • Ani Rosa
    Ani Rosa Mar 22, 2014

    year is 2008. I was told that even if i replace box, only dealer can program it...

  • Ali Galam
    Ali Galam Mar 23, 2014

    There is BCM (body control module) as part of that junction, so it may need to be programmed by the delaer, but that should still be less than the $1000 they quoted you

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  • 103 Answers

I am not sure which relay they're talking about, but there is a fuel cut off relay in that area that is tripped if you hit a hard bump (supposed to trip only in accident ituation). Look at your owners manual as gthe cut off is located in different spots on different models, usually the trunk under the carper, or in passenger foot well. Will be marked.

Posted on Mar 21, 2014

  • Ali Galam
    Ali Galam Mar 22, 2014

    Check out e bay. There are a number of junction boxes in the $100-200 range. Installation should be just plug and play, i.e discoonect wires from old box and attach to new. never heard of having to replace a whole junction because of 1 bad realy, unless the relay fried some of the wires.

  • Ali Galam
    Ali Galam Mar 22, 2014

    What year is your Mazda 3?

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Ok, here's the deal:
An accessory belt (commonly referred to as a serpentine belt or a V belt depending on application) is rubber and drives your accessories like power steering, air conditioning, etc. These are usually cheap and can be seen and replaced easily.

The TIMING BELT is also rubber, however it's job is much more critical. Basically, it times the bottom part of the engine with the top part of the engine. It is NOT seen without having to take a few things apart. It is NOT for the novice mechanic. However it is also usually not that expensive for the belt either. It's the intensive labor that's the cost factor.

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So just be sure to ask them these options. It'll be a lot cheaper to get them all done at once, rather than waiting until they go bad and having to make a 2nd trip. For instance, get the timing belt done, and THEN finding out a month later your water pump is going bad and that they could have replaced it then...

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Testimonial: "We aren't sure (yet) what the problem is, but the ignition key is one of the possible causes. When the vehicle is in the shop...it doesn't fail."

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1 Answer

I can't find the fan resistor on my 2004 Mazda 3. Can someone help? I took the glove box out but do not see it. Also, there are no good service manuals for the 2004 Mazda 3 online! Thank you, Joe


This is for the blower motor resistor 04 Mazda 3 2.0

RESISTOR REMOVAL/INSTALLATION
  1. Disconnect the negative battery cable.
  2. Remove the two nuts securing the cooler hose (LO).
  3. Remove the following parts:
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118941934
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CAUTION: While moving the A/C unit, do not apply excessive force. Otherwise it will result in deformation of the refrigerant piping or refrigerant gas leakage.
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OK, that's my "preaching" for the day......

I think it prudent to inform you that your DASH ILLUMINATION and PARK/MARKER lamps are not controlled by the PCM on your vehicle. So, I believe that would eliminate that possibility all-together. (Deep breath....sigh of relief ---- ; )

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Mazda has published a Technical Service Bulletin (TSB) for your car which addresses MANY intermittent electrical failures as a result of faulty/loose electrical connections at the PJB. I think that would be the first place I would look for the solution.

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Please rate my advise.

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