I am trying to find out why my Alt light does not come on.
Recently bought car but no Alt light.
Could someone let me know where the YW/BK wire goes to from the bulb on the dash.
I have 12v at the bulb from the BK/GN wire.
The car is a '65 200ci
Thanks,
Nick.

 

pretty sure it splices into the green/red stripe wire that goes to pin #3 of the alternator voltage regulator.

 

bad bulb??

If you've got 12v at the bulb then it should be a simple fix

 

Thanks for replies,
Bulb is good.
Does anyone have a wiring diagram showing this wire?
My Haynes one does not show the wire or Alt light in question.

 

http://budgetrestomod.weebly.com/electrical.html

not sure if this helps or not

 

not sure how you could have 12v at the bulb and not get it to light up.

https://mustangforums.com/forum/clas...t-install.html

You can just do what I did.... Give up, go to ebay and order "12v battery charge warning light, voltage indicator" from sparkbright and have it custom programed any way you want.

-Gun

 

Check the bulb seat.

 

With a continuity meter the YW/BK at the bulb wire has a resistance to GND.
I think there is a dirty connection somewhere, but do not know where the wire ends up.
I will try the GN/RD wire as suggested, but a wiring diagram would help.
Nick.

 

See link in above post............

 

Thanks for wiring diagram, will follow that first.
Nick.