Anchor Light

[celtic_mist]

Just Checking All The Nav Lights Were Working Before I Head Away For The Holidays & The Anchor Light Was Not .
Got Out The Multimeter & Found Power At The Light Fitting ,
But When The Bulb Is In Place & I Turn On The Switch The Power Seems Too Disappear !
Any Ideas To Why Its Not Working ?

 

[Remmington]

Check for corosion on bulb connections

 

[ExcaliburII]

The corrosion/bad connection will be at the switch or at the fuseboard, not at the lamp itself. (Assuming you check the voltage on the lampholder, not on the actual lamp.)

 

[volvopaul]

The voltage reading at the holder without the bulb is only enough to give a reading to the meter, if you fit the bulb then read it you will see a great reduction if nothing at all, always test a light fitting or supply to a motor etc with a test bulb over 5 watts that way you can see whats going on in the rest of the circuit.

Check for corrosion on all terminals leading up to the holder.

 

[brianrunyard]

There's a high resistance joint somewhere between the supply and the lamp holder.
As soon as you put the bulb in, the current drawn through the high resistance causes a high volt drop across the resistance.
Check, clean and tighten all connections.

 

[Steve Clayton]

I can't resist (sic) a very tongue in cheek reply.

According to several peeps you don't need an anchor light. Just hook up to any old mooring buoy, even an Admiralty one, and you won't need to show the light.

 

[celtic_mist]

I Will Try Replacing The Light Unit & If That Fails Will Re-wire
Back To The Fuse Board!
Thanks For All The Suggestions