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Thread: 1989 RRV8 Electrical gremlins!

  1. 6th June 2010, 06:31 PM #1
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    1989 RRV8 Electrical gremlins!

    Hi All,

    Posting this on behalf of a mate.

    he has just picked up a 1989 RRC V8 auto to play about with. (got it yesteday)

    This has a strange electrical issue, that only seems to have appeared today.

    Some possibly relevant points to note.

    It has an oldish dual battery system.
    It runs dual fuel, Gas and petrol
    It has an old alarm fitted that doesn't seem to work anymore.

    Anyway the issue is as follows.

    Start the car.
    Turn off ignition.
    Car keeps running, and all ignition lights stay on.

    So we stopped it by pulling off the coil lead.

    The problem also occours in a similar manner if you just turn on the ignition and then turn it off. The dash lights stay on, and the rev counter also flicks around for a few seconds before returning to zero. The radio screen also flashed randomly despite being turned off.

    To turn everything off you have to disconnect both batteries when it goes back to the original state. (ie properly off) Issue is totally repeatable

    He was also saying the rev counter was moving randomly when he was working on the electric windows yesterday.

    What could casue this? Alternator, Earths, Ignition switch? combination of these?

    Thanks!
    Pete
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  2. 6th June 2010, 07:44 PM #2
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    Scouse
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    It sounds like it's getting a backfeed from something on the ign circuit.

    Maybe a sticking relay that drops out when the battery is disconnected???

    Is the old alarm isolated?
    Scott
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  3. 6th June 2010, 08:02 PM #3
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    bee utey
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    The back feed could come from the battery isolator, if it used ignition-on to connect the batteries together. Disconnect any small wire at the isolator. If the ignition coil is fed by a relay (common trick used to beef up ignition power) very little current is needed to keep it on.
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  4. 7th June 2010, 07:39 AM #4
    PhilipA
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    BUT I think more likely to be the ign relay in the alarm.
    It's great fun stripping out an old alarm.

    Regards Philip A
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  5. 7th June 2010, 10:28 AM #5
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    Hi all i,m the mate
    thanks so far for the help
    It is an old Viper Alarm does anyone have notes or diagram to remove
    Also 1 battery drained flat overnight
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  6. 7th June 2010, 11:31 AM #6
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    Im guessing not Rod. I think we will end up having to go through the whole thing and remove it manually!

    Not impossible. I have done it before but not on a RR
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  7. 7th June 2010, 08:36 PM #7
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    GuyG
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    Viper - Car Alarms | Remote Starters | SmartStart | Vehicle Security | Keyless Entry | Interface Modules | Accessories | Transmitters | Remote Start | Find Your Next Car Alarm or Remote Starter

    You might be able to find something on their website

    Alternatively Alex maybe able to point you in the correct direction as he supplies and fits them

    Alex Minassian Car Audio, Leading Brisbane Specialist
    98 Harvey the tractor - 300 tdi Defender Wagon
    84 Alfetta GTV
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