93 Accord

I have a problem with the inner tail lights on the accord. Two bulbs in there, one is double filament (works), another is single filament (not working) and on both sides of the car they are not getting power. I tested with a voltmeter (green/blk wire coming to the single filament bulb to ground) and no power coming through (I get 10.8V on the red/blk coming to double filament). I checked fuses but might have missed something. The lights work everywhere else.

This is a problem on both sides and so I am thinking something is wrong elsewhere and not bulbs or the wiring in these taillights.

Any suggestions?

 

I guess everyone is as stumped as me. I have the wiring diagram for the taillights but can not seem to find the greenblk wire going to the single filament bulb on it.

 

check the lil square brown boxes attatched to the tailights those get moisture in them and corrode the solder joints. either resolder or replace them