1994B4Ct

My camaros alarm doesnt seem to work correctly.

It flashes the lights, pings the dash, and locks/unlocks my doors.

But doesnt sound off when the alarm is set off.

So, im wondering if theres anything i can check or do.
its an aftermarket alarm system. It looks like theres two wires going from
the alarm horn into the car. (Red and black)

Ive traced them down and the red ones hooked up but the black
is hidden under my drivers kick panel..

Any ideas on what i can do? Everything BUT the alarm horn works.

Its a sidewinder alarm if that helps.