python 990 working only 1 way

I recently installed a python 990 remote start. (I know it's an older unit but it was free.) Everything works great but I am not getting a signal from the brain to the remote. Whether the truck is armed/locked or remote started and running the LCD on the fob shows unlocked. It is not getting a signal back from the main unit. The remote also beep twice 3 times anytime a button is pressed. Any help would be appreciated!!!

Edit*** Sorry forgot to mention. This is on a 2001 Tahoe

was this a new in box system or used? normally when this happened to me its been a bad remote or antenna

blanx218 wrote: was this a new in box system or used? normally when this happened to me its been a bad remote or antenna

Used system. I had everything hooked up to make sure the system worked properly. And at that time the 2 way worked. After that I disconnected an soldered all connections and at the same time installed a new antenna because the old one was damaged. Since finished the 2 way hasn't worked.

Sounds like the replacement antenna is not a 2way antenna

blanx218 wrote: Sounds like the replacement antenna is not a 2way antenna

I guess that could be a possibility. I gave them the part number off the old antenna. But I will swap the antenna back to the old one and see what we come up with. It was just the harness that was damaged on the old one.

Antenna swap was a no go. This is aggravating hah. But at least it works. I greatly appreciate all the replies so far guys!!

Tried to relearn the remote. Still no success.

So you replaced the antenna cable? Not the antenna? how many wires are in the cable 3 or 4?

blanx218 wrote: So you replaced the antenna cable? Not the antenna? how many wires are in the cable 3 or 4?

Replace both. Antenna and cable. It is 4 wires