2000 Other Saturn Models

Noises problem
2000 Other Saturn Models 6 cyl 84,000 miles

I have recently had a new timing belt/ water pump/ serpentine belt replaced on my 2000 Saturn LS2. This evening I purchased sand bags to drive in the winter snow. I placed one bag on the passenger floor board & another in the back over the hump on the floor. Later on, I realized when I honked the horn it sounded strange. Could this be because of the additional weight in the car? Or does it mean the horn is going out?