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  1. #1
    Join Date
    Feb 2012
    Location
    Near Albany NY, USA
    Posts
    5

    Angry 2004 XC70 Electrical Syndrome

    At first the alarm activated up a few times while parked at night. Then one day while driving the horn beeped while driving. Soon after the horn stuck on and I had to remove the horn relay in the engine compartment fuse box to shut it off. Periodicaly both resetable odometers zero out. A mechanic friend of mine said it was probably due to a bad spring in the steering wheel. Years ago I had the steering wheel replaced because the coating was peeling off of it and it was still under warrantee. About a month after the steering wheel was replaced, I had an issue with the key turning in the ignition. I sprayed some WD-40 into the ignition and it seemed to free things up. Based on the different ailments of the vehicle, is there a part or common issue with this model vehicle that can be pin pointed?

  2. #2
    Join Date
    Nov 2011
    Location
    Clearwater Beach, FL
    Posts
    52

    Default

    How old is the car battery? On their death bed they send gremlins thru the electrical system.

  3. #3
    Join Date
    Feb 2012
    Location
    Near Albany NY, USA
    Posts
    5

    Unhappy

    I believe the battery is the original, so it is at least 8 years old. Vehicle seems to turn over OK, even when cold. It was a concern of mine yet this winter has been very mild. That would be a logical place to start, wouldn't a load test be the best place to start?

  4. #4
    Join Date
    Nov 2011
    Location
    Clearwater Beach, FL
    Posts
    52

    Default

    Yes do the load test...but have it done at the battery not the jump posts up front. 8yrs...Volvo batteries do last but I would replace...Trust me here do not let the car lose power when changing the battery have an alternate power source availble. you will need to save memory and a long list of other problems that may flare up when changing this battery. If in doubt take to the dealer.

  5. #5
    Join Date
    May 2007
    Location
    Calgary Alberta
    Posts
    1,339

    Default

    8 year old battery? You do know your Volvo is using your battery also as a voltage regulator? Meaning, that if the battery cannot sustain the proper voltage while in operation (or sitting still turned off), it will cause weird electrical issues to appear.

    Try a new battery - it's a $100 potential fix. The car is trying to maintain the proper voltage across all its computers - even if it has enough voltage to turn the starter, it doesn't mean its providing good clean voltage to your other cars components (meaning a consistant voltage level and amps - all necessary to avoid weird electrical issues).


  6. #6
    Join Date
    Feb 2010
    Location
    Virginia Beach
    Posts
    3,853

    Default

    8 years is past the in-service life for any battery. I would replace it just because of age, regardless of whether it appears to be working OK....and you may find that it's causing some of the issues...but regardless, it's time for a new one...and I would get a Volvo one so that you get the little vent hose...
    Current Fleet:
    2016 Tundra Crewmax 4WD 1794
    2005 MB S600 (100K, Michelin AS3+, M1 0W40)
    2002 V70-XC (238K, Castrol Edge 0W40)
    2002 V70-T5 (195K, IPD bars, Bilsteins)
    2001 V70-T5 (76K)
    1932 Packard Sedan (straight 8, dual sidemounts, original paint and interior, Shell Rotella 15W40)

  7. #7
    Join Date
    Sep 2002
    Location
    Belgium
    Posts
    2,394

    Default

    Quote Originally Posted by James Bond View Post
    I believe the battery is the original, so it is at least 8 years old. Vehicle seems to turn over OK, even when cold. It was a concern of mine yet this winter has been very mild. That would be a logical place to start, wouldn't a load test be the best place to start?
    Yes, have the battery tested, don't replace it without a good reason. Although there is undoubtably a relation
    between age and condition/capacity of a battery, age as such is certainly not the only determining factor.
    Replacing something without proper indication of failure or without test data is not very rational.
    The problems you experience could very well be the result of a bad battery, but a decent test should reveal if this is true.
    Should you replace the battery, you may consider a heavy duty model, there is enough room for a 92Ah!
    Willy
    144 GL (1974)--->244 GL (1982)--->940 GLE 2.3i (1992)--->XC70 2.5T (2004)--->XC90 T5 (2018)

  8. #8
    Join Date
    Feb 2012
    Location
    Near Albany NY, USA
    Posts
    5

    Default Thanks, and few more questions

    For the heck of it, I am going to call the local Volvo dealership in the Albany, NY area and inquire how much a new battery install will be. Then I am going to call around and price out a new after market battery. Maintaining constant power to the battery is something I would not have thought about.

    Just curious, what would it affect that would not re-boot itself in a short amount of time?

    The other question is - can I load test it while hooked up to the vehicle and not adversely affect any of the components? My thought was to disconnect the battery completely during the test...

  9. #9
    Join Date
    Jul 2011
    Location
    Piedmont Triad, NC
    Posts
    153

    Default

    When you have yor new battery you can start the car, take out the old battery while the engine is still running and install a new one, still engine running. no issue.
    1998 V70 187K miles and counting,now sold
    2002 VW GTI 1.8 T My sweet baby
    2002 V70 XC 158K miles sold
    2005 V70 XC 98Kk miles Newly aquired

  10. #10
    Join Date
    Feb 2010
    Location
    Virginia Beach
    Posts
    3,853

    Default

    What

    You can't take the battery out when running! Might work in some cars, but with this one? NO WAY I would do that...Shut the car down for at least five minutes, remove the battery, place the key in position II, then attach the new battery, lock and unlock 3x and you're good to go...
    Current Fleet:
    2016 Tundra Crewmax 4WD 1794
    2005 MB S600 (100K, Michelin AS3+, M1 0W40)
    2002 V70-XC (238K, Castrol Edge 0W40)
    2002 V70-T5 (195K, IPD bars, Bilsteins)
    2001 V70-T5 (76K)
    1932 Packard Sedan (straight 8, dual sidemounts, original paint and interior, Shell Rotella 15W40)

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