70 Targa interior dome light problem

[356robo]

I have purchased a new dome light since I found the existing to be broken and shorted out, blowing the fuse.

I replaced the fuse and the clock now works as it is on the same system.

Now, I'm having a problem wiring the replacement light. There are two wires, one tests with 12.5 volts and the other tests as a ground. The light has 3 spades for wire attachment. One connects directly to the light frame, likely for chassis grounding. One attaches to one end of the bulb holder. One attaches to what appears to be the switch mechanism.

The bulb check out fine, but when installed in the fixture and the two wires attached, as I believe they should be (power lead to fixed end of bulb and ground lead attached to the switch mechanism) I get no light.

Can someone describe the correct wiring?

Help

Thanks in advance,

Rob

[ossiblue]

I just have to ask, have you moved the lens of the light through all of the three positions?

[Gogar]

As LJ said, the dome light has 3 positions,

ON,
OFF,
and "DOOR".

One wire is (of course), 12V. I suspect that the brown wire goes to the button in the door jamb.

Open your door and check that second wire for ground, then push the door-jamb button in and see if the wire loses ground. Then you know it's your "door" wire.

Now I'm guessing that you leave that third directly grounded terminal alone.

Here's a 1973 schematic: The dome light(s) is #23, and the door switch(es) is #36.