How to Install a Volt Gauge in a Car

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  • 2-3 hours
  • Intermediate
  • 35-60
What You'll Need
Soldering gun
Hole saw
Wire crimpers
Wire cutters
14-Gauge wire
Zip ties
Open end wrench set
Volt gauge

A volt gauge is a device that enables you to keep a close eye on the electrical system of your vehicle. These gauges tell you if the voltage drops in your vehicle. You will also be able to know if there is a problem with your alternator or your battery, which is why having one installed is so important.

Step 1 – Trim Panel

Identify a terminal that is energized when key is on. Remove the trim panel that is on your dash to prepare it for the volt gauge. You will do this by turning your key on and then putting your car in gear. You are now ready to pull the panel off. Put your vehicle back into park and then turn off your key.

Step 2 – Drill

Removed the trim panel, locate a spot on it where you want to drill a hole for the new gauge. You will use the hole saw and the drill to do this step. You need to make sure that there is not going to be anything behind the trim panel that may cause any issues after you have put the gauge in its place.

Step 3 – Disconnect

It is very important that you take the time to disconnect your battery before you do anything. Using correct wrench, disconnect negative terminal from battery.

Step 4 – Wire

Connect one end of a 14 gage wire to the key on live terminal previously identified and connect other end to volt gauge. Connect another wire to second terminal of volt gauge and other end to a good ground.

Step 5 – Volt Meter

Now install the volt gauge into the trim panel. Reinstall the trim panel. Go in the reverse order of the disassembly.

Step 6- Test It Out

Reconnect everything and turn the car on to test it out. You may need to run it around the block to get an accurate test.