hi if u connect the battery the wrong way the gauges will bouncing this is because the gauges has whats called a ballast resistor an diodes this prevent the voltage current to flow only in one direction so it wil be preventing burning of the gauges
sounds stupid but maker sure you have your leads on the battery right hooking up the ground to the positive side does all kinds of weird things like this
Yes it does.
battery cables not making good contact with battery
need more info what gauges?
If you don't disconnect the battery when installing gauges, it is possible to create a short circuit and blow a fuse. Some gauges have power present even when the ignition switch is turned off.
get battery tested. that happen to me. it was the battery
loose battery connection, or dead battery.
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.
Just had the same problem with my 03 Windstar, problem went on for about 3months. Finally replaced the alternator and have not had a problem since.
Loose battery or alterator connections
One of the gauges is outside the safe range. Check oil pressure, coolant temp, and battery voltage.
i had the exact same problem with our 91 voyager, i cleaned the battery terminals and the problem went away immediately