Jubilee headlight

Hi Kelvin,

The speedo illumination bulb should come on if the ignition switch is in the ON position. This then shows a red glow through the two red lenses in the headlamp shell. In other words it is in effect an ignition light which stays on all the time the ignition switch is on. It doesn't go off when the alternator comes on charge which is what you normally expect.

I think I got that bit of info from the Jubilee handbook. The light is normally too dim to be seen anyway so it's not of critical importance or maybe I am missing something.

Patrick

Previously patrick_mullen wrote:

Hi Kelvin,

The speedo illumination bulb should come on if the ignition switch is in the ON position. This then shows a red glow through the two red lenses in the headlamp shell. In other words it is in effect an ignition light which stays on all the time the ignition switch is on. It doesn't go off when the alternator comes on charge which is what you normally expect.

I think I got that bit of info from the Jubilee handbook. The light is normally too dim to be seen anyway so it's not of critical importance or maybe I am missing something.

Patrick

Absolutly right.

I think this was only done for a year or so, and it lead to a high rate of speedo bulb failures.

In 1960 the wiring diagram shows the speedo bulb on at the same time as the back light instead of being on all the time. At that point, the red 'telltales' in the headlamp were removed.