Volts Gauge?

Just Installed my Volts Gauge tonight. the gauge seems to jump between 13 and 14 volts when the blinker is on. is that normal? if not what can i do to stop that. It rides at 14 volts normal driving but soon as the blinker is on it jumps back and forth.

What happens when you turn on the brake lights or headlights?

What happens when you turn on the brake lights or headlights?
The headlights or brake lights have no effect, day or night with my volts.
The gauge only jumps from 13-14 volts when blinker is on. with or without everything on. What about the voltage boosters they sell, is that a solution? not sure. thanks

The fluctuation of the voltage gauge is normal when you use your blinker lights.