http://www.505turbo.com/forum/index.php?/topic/3194-505t-wagon-alternator-trouble/
I need this same info.
'86 turbo gas N9TE 505 alternator
I changed my oil filter and then found there was a thin brown wire dangling down. Car starts fine but the battery charge light stays on. Voltmeter at battery shows no charging from alternator.
On the back of the alternator there is a thick brown wire with a lug that's secured to the top post with a nut; there is a black plastic plug in the middle with a black wire that connects to a RF filter? which goes to the post at the bottom (or opposite the post where the thick brown wire goes in).
So I attached the small brown wire to the same bottom post that the RF filter bracket is attached to but the battery charge light in the dash still says on and no juice going to the battery.
Some clues would be appreciated. (I know this is a 4 yr. old thread)
Thanks guys!