Alternator not charging, and no battery light.

[Tom77]

The car is a 82 Rabbit Diesel, the alternator is good, was tested, the battery light on the dash doesn't come on, even when the key is on, only the oil light.
I replaced the dash, but same thing, no light, and no charge.
Any suggestion?

Thanks.

[R.O.R-2.0]

the only time the light doesnt come on (from my experiences) is because the exciter wire is un-hooked from the alt, or if the light is burnt out..

have you confirmed with a volt meter that there is no charge coming from the alt?

[Tom77]

Yes I did, also the alt was tested at two different locations, and passed.
I don't think is the light, because I replaced the dash, with a spare.
Probably is what you said, the wire is un-hooked somewhere.
I did a continuity test from the rubber plug that goes to the alt, to the plug in the dash, the only one that failed was the blue wire.
Can I bypass the blue wire?
If so, what I have to do?

Thanks

[R.O.R-2.0]

Yes I did, also the alt was tested at two different locations, and passed.
I don't think is the light, because I replaced the dash, with a spare.
Probably is what you said, the wire is un-hooked somewhere.
I did a continuity test from the rubber plug that goes to the alt, to the plug in the dash, the only one that failed was the blue wire.
Can I bypass the blue wire?
If so, what I have to do?

Thanks

that blue wire is what operates the light. if the blue doesnt work, the light doesnt work..