Mustang#5

I had the same problem when I installed mine. The guy from Web electric called me, first thing he asked are you testing it without the car running. I told him yes. He said that's problem #1 it needs to be running to put out more than 12 volts. He made me disconnect them, start the car plug back in and put on the 4 way flashers. According to him that's what resets it. He said now keep it running turn off the 4 ways, and try your turn signals while the car is still running. It's been working great ever since. Give it a try. Good luck.

157dB

You have 12.6 Volts vehicle off.
Unless your battery has gone way south...
13.8 Volts typical vehicle running.
A sequential kit that wont work correctly without the engine running?
I dont think so.
Lawerence must have been on drugs with that diagnosis...

SkyStang06

When I first installed my kit, 2 of the passenger light would come on, i switched around the bulbs and figured it wasn't the harness but that i needed to replace my current bulbs.

Once I did that, the sequential kit worked perfectly, and the car didn't have to be off.