Strange 996 turn signal problem
 

Last evening was the first time I’ve driven my newly-acquired 2003 996 C4S at night, and I have a strange problem with the turn signals. When the headlights are turned on (or the parking lights for that matter), all 4 turn indicators (front/rear and right/left) illuminate steadily (not flashing) as well as the right and left turn indicators on the tach. While driving that way, when I try the turn signal stalk (on the steering column), the turn signals don’t flash. With the headlights turned on the emergency flashers won’t operate, but they do if the headlights are off. With headlights off, everything functions as it should.
The only thing I’ve done which might be a contributing factor is to wire the side markers into parallel with the turn signal circuits to flash with the turn signals []Rennlist Member Gallery.
Has anyone else had this problem? And if so, what was the cause and the solution/fix.
Thanks.

Bk/wh or wh/bk
 

Read the original mod from Rennlist and noticed a BK/WH wire(smaller gauge wire-proper wire) and a WH/BK wire in headlight area. If you spliced into the wrong wire it might explain your problems as you could be getting a positive feed from the headlight circuit when they are on. The original mod shows splicing in at the "X" connectors rather than at the headlight plug. Guess ok if right wire spliced.

Problem solved. The instructions in that Rennlist thread are indeed correct. I misinterpreted them, and after re-wiring correctly, the side markers will flash with the turn signals when the headlights are on.