I have the 5901 installed in my Max and my parking lights not longer flash when locking/unlocking.
They still work on the car (fuse is fine) and the stock remote fob flashes the directionals but no lighting confirmation from Viper commands (still get the chirps though).

Any ideas? Did I change a simple setting on the remote by accident?

 

The parking light fuse on the Viper unit is shot. I had the same issue happen to me. You have to find the module and replace the fuse for the parking lights.

 

Modules under the kick panel, I'll check the fuse tomorrow. Thanks for the help!

 

its inside the brain of the alarm. take the cover off and its a mini 10a.