LED bulbs for number plate light.

[Andy B]

.....
The lamp failure warning system expects to see a specific load in order to work .....

Number plate lamp is NOT on the lamp check   

[Martian]

.....
The lamp failure warning system expects to see a specific load in order to work .....

Number plate lamp is NOT on the lamp check   

It gets it's feed from the sidelight circuit which is fed via the lamp failure warning system, and by reducing the expected load the system expects to see it then fails to illuminate the lamp.

[Andy B]

....
It gets it's feed from the sidelight circuit which  ....

Doesn't really  .............. 1500 - 1530 in the Haynes
hence why a duff number plate lamp(s) doesn't trigger the lamp check 

[Martian]

Don't have a Haynes in front of me Andy, but the wiring digram I'm looking at shows the number plate illumination is fed from the RH sidelight feed which in turn comes from the headlight switch.

Dunno why I read it as being fed from the lamp failure warning module, a second look shows that is connected across the lamp being monitored.......maybe it's time to upgrade the reading specs to 1.5x 


@ PhilCav,

In your original post you said you tried the LED lamp "both ways around".....you can only put the lamp in one way so I'm a bit confused there.

[fiend61]

ummm arent the numberplate lights festoon style martian  so will go either way round 

[Martian]

ummm arent the numberplate lights festoon style martian  so will go either way round 

Aha....

They come in two different lengths, and the difference is less than a handful of millimetres.

[fiend61]

 

[TheBoy]

Had an unusual one tonight! Bought a couple of led bulbs for the number plate light on the omega and the wifes vectra B as they'd both gone so thought id downgrade. Tried fitting them on the veccy and it wouldnt work. Thought there might be an issue with the holder so checked for power which was ok. Tried a normal bulb and it worked fine. Tried the LED bulb both ways round still nothing. Powered the holder direct onto the battery and it lit up fine. Thought i'd then try the omega and the same problem so again put a normal bulb in and all lit ok!! Puzzled I thought i'd see if anyone has any idea???

Fixed your spelling mistake

OK if you say so.......still in the dark ages are we? 

Welcome to deepest Northamptonshire - we still use candles