Poo! Ignition light

[stag36587]

Having had an ignition light that fails to go out due to a non-functioning dynamo which was so seized I couldn't get the cover off to check the brushes, I bought a new replacement (yes I could have got an alternator but I wanted originality). The difference now is that the ignition light goes out for a max of half a second before it glows constant red again. I will
now try other things by process of elimination -
Check wiring, voltages, regulator etc.

Poo I was hoping for a quick fix!

[bmcecosse]

You should have tested the dynamo before ordering a replacement........ You will need to polarise the new dynamo to suit your car. Run a length of wire from the smaller terminal and touch it a couple of times to the non-earthed terminal of the battery. Then connect up as normal to see if it works.

[stag36587]

Thanks Roy - actually I did test the old dynamo before removal and polarised new one correctly. As ever with this car a process of elimination but that's half the fun of it isn't it.

[bmcecosse]

You've all been reading this forum for too long now............ So - the old dynamo didn't 'run as a motor' when tested? Does this new one ?

[stag36587]

Yes new dynamo seems to be fine. I tried rewiring between dynamo and the regulator but no difference. Ignition light dims fractionally when I rev engine. A new regulator needed perhaps?

[bmcecosse]

Indeed if the dynamo runs as a motor..... But maybe clean the contacts and adjust as per Manual?

[stag36587]

New regulator fitted and ignition light now goes out - lovely! now I need to sort my non-functioning brakes

[mike.perry]

Do the regulator points open and close correctly?

[stag36587]

Do the regulator points open and close correctly?

I'll double check that at the weekend Mike.

Thanks

[bmcecosse]

The regulator points won't help the brakes!

[stag36587]

The regulator points won't help the brakes!

Haha if only Roy I'm installing a new bathroom suite this weekend - in the house, not the minor - but will try to get at least 1 hour to bleed the brakes yet again!