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Thread: 2003 ZC vectra: Horn, wipers, indicater and light problem

  1. #1
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    Default 2003 ZC vectra: Horn, wipers, indicater and light problem

    Hi people ive got an interesting problem if anyone has got any ideas???.

    As follows:, when i turn the ignition on to stage two (car not on), the normal lights at the front of the car come on regardless whether they are turned on or off and stay on. When i goto use either left or right indicater, the indicaters flash very fast when using the stalk, but not when used by the hazard lights button, I have now lost use of winscreen washers and wipers back and front and no longer have any horn function. I am very technical minded and am a last year electronic and communication engineer student. I have checked every fuse and every relay and every globe possible in the car. With exception of ripping apart the dash/steering colomn cover (since theres security screws, which is my next mission).

    Now for one last symptom of the car: when i indicate right, both front indicaters come on, the rear right comes on and no side indicaters come on. When i indicate left, both indicaters at front come on and only the left at the back comes on and no sides come on. Which i find quite strange.

    And one last little niggle of a clue to what it might be, if i leave the car off for 10 min or so, and turn ignition and test indicaters straight away, they will flash normally for about 5 sec and then go back to very fast flash. Through further diagnosis in this same 5 sec "grace" period ive tested the other non-working functions such as horn etc... and those still have no normal response function within that first 5 sec, just the indicaters.


    Can anyone point me in the right direction, or has been through this before??? PLEASE HELP AS IM GOING INSANE AND it will be dangerous as soon as its starts raining i cant drive again.

  2. #2
    Regular Member Ozz's Avatar
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    An abbreviated word (or an accumulation of words) comes to mind F.U.B.A.R..........

    Mate, if it were my car I would be paying a visit to my friendly local Holden dealer.


  3. #3
    VIP-Member Johnsdutton's Avatar
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    Vehicle : Signum

    Trim : Elite

    Engine : 3.2 v6

    Year : 2004

    Mileage : 110,000

    Default

    Have you maybe beeen abducted by aliens? It sounds as if their plasmatron scanner has mangled the electronic system in your car.

    I had a similar problem with the indicators.Turned out it was a faulty bulb, it was a night mare trying to trace it. Sorry cant help with the horn apart from maybe it is just coincidence that it has blown at the same time.
    Last edited by Johnsdutton; 17th August 2008 at 10:14.
    3.2 v6 Signum and loving it

    http://www.freewebs.com/johnsdutton/

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    Hmm... a dealer with a Tech 2 will probably be able to tell you what's going in a short amount of time. Having said that, they may wish to charge you an arm and a leg.

    Some random bits of information that may give you some clues:

    • Most of the communication between electronic modules in the car is done via CAN.
    • The hazard switch and light switch are connected to the BCM. The indicator lever and horn switch are connected to the CIM (steering column module). The front indicators, front headlamps, front wiper, washer pump and horn are connected to the UEC. The tail lamps, rear indicators and rear wiper motor are connected to the REC.
    • I have a feeling that there's some sort of failsafe logic in the UEC that will turn the headlamps on if it loses communication with the BCM.
    • There is a dedicated wire from the BCM to the UEC and REC for activating the hazard warning lights.


    Given that your rear indicators work OK, I suspect there's some sort of low speed CAN communication problem between the UEC and BCM. I'd be checking for the integrity of a green wire between the two.

    Good luck!

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    Regular Member AndrewTi's Avatar
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    CIM Module playing up?

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    Default uhumm...

    Hi stevedee3, that sounds interesting, so how and where should i be checking for this green wire from the UEC and BCM. I know nissan's and bmw's from the back of my hand, but this damn holden Vectras is still new grounds for me. Any extra help by any chance, would be thankful.....btw how do you know its a green wire, do you have access to vectra tech spec/schematics etc... if so is it possible that there is a place where i can access these.

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    Regular Member BigP's Avatar
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    Quote Originally Posted by AndrewTi View Post
    CIM Module playing up?
    Thats what I'd go for.

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    I have now found someone with an obd2 reader, i just need the software for it does anyone know where i can download, or someone who can donate me a copy or point me in the right direction???

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    EVERYONE WANNA HERE A STORY?

    I took the car to there dealers and as usual i got treated like absolute crap. I threaten them that problems like this has been happening since i brought the car. They lookd at it initially for free and then they hooked it up to fault diagnosis through obd2 etc......and found an under bonnet sensor of some sort was "proberly" faulty (i will post codes when i get the sheet back later) and that there were no communications to the UEC what so ever (no comms ips, no comms ipc, no comms abs, no comms airbag the whole works, no canbus comms.....etc). They tried to extort me $200-300 to confirm a fault that they didnt even know was going to be correct. I was disgusted and threaten to bring media down there, and sue them etc the whole works, they then refused to perform an repairs on my car and refused me service. Ontop of this saw the mech insp sheet on the desk when i got there and asked if i can have a photo copy to prove my car was here, they would only give me the front and not the back (which i read anyway), I ASKED REALLY LOUDLY "HAVE THEY GOT SOMETHING TO HIDE???", and they refused to give me a copy, soemthing rally really suss was going on and the manager new it, the sob's didnt want the hassle. I have since taken my business to another holden dealership which have thus far looked after me with open arms. They have been gracious enough to have decent and honest communication with me and trying to sort it out. Hopefully they will have more luck. If its the CIM its gonna cost an arm and a leg, but im preying its another sensor or soemthing else. I will keep everyone updated on this, because it maybe very interesting to see what the problem and solution is in the end. Its all crazy and up in arms atm. Im shell shocked that everytime ive been to this dealership ive been treated with such disrespect and lack of service, i will be actively persuing legal forms of retribution and all. They havnt heard the last of me yet!

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    Seems to be 2 copies of this thread running. Here's the other:
    http://forum.vectra-c.com/showthread.php?t=55641

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