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Central Locking Control Unit



Hi all,
        I have narrowed down a problem with my central locking ('86 E30)
to the central control unit, has anyone ever repaired this unit? Is it
the amplifier chip blown, or is it some of those diodes? I am fairly
confident it can be repaired as when I press the top of the relays (unit
without cover on), the locks pop up and down, I reckon it is the control
circuit of these relays that are shot. Any help or advice would greatly
be appreciated.
Mark Fitzgerald

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