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  1. #1
    Join Date
    Nov 2006
    Location
    Western Va Mountains
    Posts
    40

    Default Turn signals stopped working

    HELP!!

    I drove our '03 XC70 last night after it sat for a week, and the turn signals don't work. After stopping and restarting, the signals worked for about 2 blinks, each direction, then stopped. There is no message shown on the message screen.

    Even more perplexing, I looked for fuse and relay locations and didn't see anything listed.

    Anyone else have this experience?
    05 XC70 44K
    O3 XC70 126K Sold (sadly)
    04 Tundra 4X4 72K
    02 Harley UltraClassic 41K

  2. #2
    Join Date
    Mar 2008
    Location
    Western Head, Nova Scotia
    Posts
    3,089

    Default

    Check all the related bulbs first, of course; but sounds like a relay to me. I don't have my copy of VADIS handy right now, but I think that relay is on the panel in the drivers foot well. Probably need VADIS to verify which one as there are a number of relays and shunts on that panel.

    Cheers,

    Bill
    Western Head, NS CDN

    '08 BMW 750i (Black Sapphire)-204K kms to-date
    '05 XC70 (Lava Sand)-296K kms to-date
    '02 V70XC-gone @393K kms
    '05 V70R (Magic Blue)-120K mi to-date - gone
    '96 854R (Red)-real CDN-spec 5-speed R - gone @270k kms
    And other Volvos and misc. Euro stuff

  3. #3
    Join Date
    Sep 2002
    Location
    Belgium
    Posts
    2,404

    Default

    Some info.
    Willy
    144 GL (1974)--->244 GL (1982)--->940 GLE 2.3i (1992)--->XC70 2.5T (2004)--->XC90 T5 (2018)

  4. #4
    Join Date
    Jan 2007
    Location
    Nova Scotia, Canada
    Posts
    1,446

    Default

    Sounds like the flasher (a relay) itself crapped out.......do the four way flashers work?

    Dave.
    Our Most Probable Fate Is Death !!!

  5. #5
    Join Date
    Sep 2002
    Location
    Belgium
    Posts
    2,404

    Default

    I think the XC doesn't have a flasher relay in the true sense of the word, from the
    wiring diagram it looks like the turn signals are generated by the CEM instead.
    Willy
    144 GL (1974)--->244 GL (1982)--->940 GLE 2.3i (1992)--->XC70 2.5T (2004)--->XC90 T5 (2018)

  6. #6
    Join Date
    Mar 2008
    Location
    Western Head, Nova Scotia
    Posts
    3,089

    Default

    Quote Originally Posted by Willy View Post
    I think the XC doesn't have a flasher relay in the true sense of the word, from the
    wiring diagram it looks like the turn signals are generated by the CEM instead.
    Willy
    Maybe there are differences amongst MY, but when I activate my signals, and e-flasher too for that matter, I hear the click of a relay. Of course, that does not mean that there couldn't be a relay hard wired to a board, but that panel (CEM?) in the footwell where the headlight shunts are has quite a few replaceable relays on it. I've just never stuck my head in there when the relays are going to see if I could figure out what is what. May later years are different, but I'm betting that the relay is bad and its on that panel and replaceable.

    Jeez, I've really stuck it out there on this one!

    Cheers,

    Bill
    Western Head, NS CDN

    '08 BMW 750i (Black Sapphire)-204K kms to-date
    '05 XC70 (Lava Sand)-296K kms to-date
    '02 V70XC-gone @393K kms
    '05 V70R (Magic Blue)-120K mi to-date - gone
    '96 854R (Red)-real CDN-spec 5-speed R - gone @270k kms
    And other Volvos and misc. Euro stuff

  7. #7
    Join Date
    Sep 2002
    Location
    Belgium
    Posts
    2,404

    Default

    The CEM (Central Control Module) is located under the hood, somewhat at the opposite site from the air inlet filter (also in a black housing).
    I can't say if there are differences between My's, the wiring diagram I posted is for MY 2003 and there are no relays in that diagram.
    Willy
    144 GL (1974)--->244 GL (1982)--->940 GLE 2.3i (1992)--->XC70 2.5T (2004)--->XC90 T5 (2018)

  8. #8
    Join Date
    Mar 2008
    Location
    Western Head, Nova Scotia
    Posts
    3,089

    Default

    Quote Originally Posted by Willy View Post
    The CEM (Central Control Module) is located under the hood, somewhat at the opposite site from the air inlet filter (also in a black housing).
    I can't say if there are differences between My's, the wiring diagram I posted is for MY 2003 and there are no relays in that diagram.
    Willy
    In VADIS the only reference I can find as to relays is in the "Relays, Fuses and Wiring" section within the Electrical System function area. In there, it refers to an overhead car diagram with the CEM located at position # 2 described as "2.Relay box in the passenger compartment, central electronic module (CEM)". Also if you take a look at the top picture here (http://www.xenonvalot.com/xenonfixvolvo.html) you will see a number of small black boxes as well as two silver boxes on a panel referred to as the CEM. These are the relays/panel I'm referring to and this panel is located above the drivers feet (LHD Cars, of course) in the foot well . In my experience, turn signal and e-flasher relays are typically housed in the metal-cased silver boxes, but I'm not confident enough to say these shown are the culprits we are talking about here. Also assuming that all the bulbs and associated connections are sound, you should be able to get the e-flasher to work even if the turn signals work as they are controlled by separate relays. However, if something has gone pear-shaped in the CEM, who knows. In any event, he should check the easy stuff first; bulbs, bulbs seating properly in their sockets, then relays.

    Cheers,

    Bill
    Western Head, NS CDN

    '08 BMW 750i (Black Sapphire)-204K kms to-date
    '05 XC70 (Lava Sand)-296K kms to-date
    '02 V70XC-gone @393K kms
    '05 V70R (Magic Blue)-120K mi to-date - gone
    '96 854R (Red)-real CDN-spec 5-speed R - gone @270k kms
    And other Volvos and misc. Euro stuff

  9. #9
    Join Date
    Sep 2002
    Location
    Belgium
    Posts
    2,404

    Default

    The slim items in the relay box are, as can be seen from the wiring diagram and read from the website you refer to, resistors wired as a shunt, not relays like the more voluminous items in the box. If they were relays, their schematic symbol would show a coil and contacts. This can also be seen in the attached (partial) component list.
    Referring to the schematic diagram for the turn signals, item 20/32 and 20/34 are listed as shunts, not relays. Of course this does not mean the shunts can't be the problem, although it would be rather uncommon if the shunts for both left and right turn indicators would show the same problem.
    For a good insights in the electrics/electronics of the XC, Vadis is not the right source, yopu need the complete wiring diagrams for that. They contain all relevant information, including connector layouts, component locations etc.
    If you like to have the (pdf) file (MY2003), let me know, I will then upload it to Sendspace and post the link here (the file is too big for email)
    Willy
    Last edited by Willy; 07-15-2009 at 09:59 AM.
    144 GL (1974)--->244 GL (1982)--->940 GLE 2.3i (1992)--->XC70 2.5T (2004)--->XC90 T5 (2018)

  10. #10
    Join Date
    Mar 2008
    Location
    Western Head, Nova Scotia
    Posts
    3,089

    Default

    Hmmm, yep, I see what you mean now. I stand corrected. Those bloody wiring diagrams are so complicated to try and interpret this stuff is difficult. Be nice if they would put the component keys with the diagrams (at least in the copy I have).

    Any road, it does appear that they now split the circuit left and right versus indicators and e-flasher like in the older models. As far as getting back to the original problem, it appears that the fix is a heck of a lot more difficult and hence expensive than if the more traditional designs would have still been used as it now points, as you have suggested, more to the CEM. In any event, a trip to the dealer to see what the CEM looks like programmatically probably would be a good step.

    Good luck,

    Bill
    Western Head, NS CDN

    '08 BMW 750i (Black Sapphire)-204K kms to-date
    '05 XC70 (Lava Sand)-296K kms to-date
    '02 V70XC-gone @393K kms
    '05 V70R (Magic Blue)-120K mi to-date - gone
    '96 854R (Red)-real CDN-spec 5-speed R - gone @270k kms
    And other Volvos and misc. Euro stuff

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