Yes they reversed one or both of you turn signal plug harnesses

 

I just had my 993 sprayed and the car returned with the fast blink. I did the switching now everything works as expected until the brakes are applied, then the car blinks slow...

 

This does not make sense... if the light that runs the rear turn signals flashes but at a high speed, then isn't the wire
in the correct location? My left side is running fast and that applies to the front turn signal light also..

So swapping wires would put "non" flashing" current to something that is supposed to flash...???

 

Dude - just go with it.... Who can explain "german engineering" ! LOL this is the fix.

 

YOU are correct- it did fix the problem!!!
a truly faith based fix...

 

I had this same issue after replacing a taillight over the weekend. The fast blinking is just to let you know that something’s wrong. Worked, didn’t it?

 

This thread is like herpes, a gift that keeps on giving. Spent a day to clay bar, polish, and wax unknowingly swapped the clip ends, thanks.