led flasher relay

I know this has been posted before, but couldn’t find it. I’m looking for the correct flasher for LED turn signal conversion. I bought a CF13, but the output for the dash indicator is negative and needs to be positive.

So I have replaced the turn, brake, reverse and marker lights with LED.....and I cannot get the turn signals to work.... I have tried various LED Flasher relays and none have fixed the issue. I got the bulbs from SuperbrightLED. I have not installed resistors in the lines... But I was under...