At 10:37 AM 10/19/2012, marc rose wrote:
>I have a 90 carat and have no tail lights!!  I have turn signals no tail.

The entire fixture uses the same ground, so if the turn signals and
brake lights are working correctly the grounds are good (if the
marker lights worked but the stop lights did not, that could easily
be a bad ground, in which case the marker light(s) would go out when
the brakes were applied).

You're looking at a supply or contact issue.  If the rear side marker
lights are working then you have supply at least to the connector
that plugs into the fixture; if not you'll have to trace back up
tracks 103/107 to find where the voltage appears.

>I checked all the bulbs and they look good.  Where do the tail light ground
>at?

To amplify about the ground location - look at tracks 103 and
107.  Where they go to ground you see "12" in a circle.  Referring
back to the ground connection list on 97.203, ground connection 12 is
at the left side of the engine compartment (and I happen to know that
the collection of grounds there is bolted to the firewall directly
beneath the ignition coil).

Yrs,
David