Indicators all staying on
Discussion
Hello peeps,
Our 1994 500 has developed an indicator problem on the way home from work today. With the ignition on, all 6 indicators light up and stay on, dash lights and LED included. With the ignition off, the hazards work fine, but the central locking / alarm doesn't work.
From looking at the wiring diagram on p278 of the bible, if I understand correctly the only items where all 6 indicators could be connected together are in the hazard relay and the column stalk switch.
With the hazard relay removed, the indicators all still light up (except the hazard doesn't work of course), implying it's the column switch. But the column switch is only powered by the flasher unit, which clearly works OK as the hazards flash when the relay is in. So why don't all 6 indicators flash together if the column switch is dodgy???
If the top diode shown were to fail, the ignition would come on with the hazard switch [it doesn't]. If the lower diode shown were to fail, the hazard relay would be energised with the ignition on, but with the relay removed I still have a problem!
Something wrong in the alarm controller perhaps, somehow powering the 6 indicators whenever the ignition is on? It's a Microscan 400 series, but I haven't found where the magic box is yet.
Any suggestions appreciated!
Ta
Ruari
Our 1994 500 has developed an indicator problem on the way home from work today. With the ignition on, all 6 indicators light up and stay on, dash lights and LED included. With the ignition off, the hazards work fine, but the central locking / alarm doesn't work.
From looking at the wiring diagram on p278 of the bible, if I understand correctly the only items where all 6 indicators could be connected together are in the hazard relay and the column stalk switch.
With the hazard relay removed, the indicators all still light up (except the hazard doesn't work of course), implying it's the column switch. But the column switch is only powered by the flasher unit, which clearly works OK as the hazards flash when the relay is in. So why don't all 6 indicators flash together if the column switch is dodgy???
If the top diode shown were to fail, the ignition would come on with the hazard switch [it doesn't]. If the lower diode shown were to fail, the hazard relay would be energised with the ignition on, but with the relay removed I still have a problem!
Something wrong in the alarm controller perhaps, somehow powering the 6 indicators whenever the ignition is on? It's a Microscan 400 series, but I haven't found where the magic box is yet.
Any suggestions appreciated!
Ta
Ruari
The Microscan people (Performance Products Ltd.) said they'd take my unit back and have now sent me a new replacement with a couple of new remote fobs, all FOC despite the thing being well out of warranty. Top service, thanks guys!
New control unit fitted last night, all is well again.
Ruari
New control unit fitted last night, all is well again.
Ruari
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