Having a short in the turn signal wiring can cause gauges to fluctuate. If the battery gauge is fluctuating corrosion on the cables can be a possible cause.
Is this an automatic or manual transmission?
No, they do not have traditional turn signals but have flashing lights.
A short in the turn signal wiring can cause the voltage gauge to fluctuate. A loose ground wire can also cause the gauge to fluctuate.
my turn signals do not work in my 1992 Pontiac Firebird
No, but the turn signal relay has a direct effect on the turn signals.
No, turn signals are required on the vehicle.
The turn signals are not programmable.
Turn signals are definitely preferred. Most drivers don't look for hand signals, but, they do look for turn signals. Some people don't even know how to make correct hand signals while driving.
Required by law (motorcycles manufactured before 1973 are not required to be equipped with turn signals.)
Open the fuse box. Turn the fuse box cover over and you will see a complete listing and the location of every fuse.
You use your arms out he widow as signals.
If you mean turn signal hand signals, then yes.