Besides having these gauges, your car will have a number of warning lights that will illuminate if there are problems with those systems. One gauge that is missing in most vehicles is the charging, or voltage, gauge. With a little information you can easily add a voltage gauge to your vehicle. Most vehicles built today come with a warning light on the dash that looks like a battery. When that light illuminates , it typically means that there is not enough voltage in the vehicle's electrical system.

How to Install a Car Volt Amp Gauge

Most of the time this is due to a failure in your vehicle's alternator. The downfall of this warning light is that, when it comes on, the voltage in the system is very low - and if the battery becomes low enough, the vehicle will end up stalling. Installing a voltage gauge will allow you to see changes in the charging system well before it becomes a serious problem.

Having this gauge will make it much easier to decide whether it is time to pull your vehicle off of the road, or if you can make it to where you are going. Park your vehicle and apply the parking brake.

how to install a volts gauge

Your parking brake should be a pedal or a hand brake. If it's a pedal, push it down until you feel the brake engage. If it's a hand brake, push the button in and pull up on the lever. Release the latch inside the car. Stand in front of the car and lift up the hood.

Disconnect the negative battery cable. Position it away from the battery. Decide where you want to install the gauge.


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  • Part 1 of 2: The purpose of a voltage gauge?
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First, you need to see how the gauge mounts: If it has a screw mount, you need to make sure that it is mounted in a spot where screws will not hit anything inside the dash. Run the wiring between the gauge and the battery. Using the appropriate size wire, run wiring from where the gauge will be mounted to the positive battery terminal. Attach connectors to the wire you just ran and the fusible link. Install an eyelet connector and crimp into place on one end, and crimp a butt connector on the other end. Remove the nut from the positive battery cable end clamp bolt. Install the eyelet and tighten the nut back into place.

Install an eyelet to the other end of the wire. You will install this eyelet where the wire will mount to the gauge. Find the wire that goes to the lighting circuit. Use your wiring schematic to locate the positive wire that supplies voltage from the light switch to the lights. Run a wire from where you are mounting the gauge to the lighting circuit wire.

Using a three wire connector, crimp that wire to the lighting wire. Attach an eyelet to the end of the wire you just ran from the lighting circuit wire.

Wiring And Installing Water Temp & Voltage Gauge From Dragon Gauges - Fiesta MK6 Build - DIY

Attach an eyelet to the wire running to the grounding point. Attach an eyelet to the end of the wire that will connect to the gauge. Connect the three wires to the gauge.

The wire going to the battery goes to the signal or positive terminal on the gauge; the wire connected to the ground goes to the ground or negative terminal. Can I just use the two wires from my amp gauge to hook up to my new volt meter gauge? The voltmeter will cause a slight draw on the battery so I would recommend using a wire that is hot with the key in the "on" position. Not Helpful 2 Helpful 9.

how to install a volts gauge - Mighty Car Mods Official Forum

Most cars and trucks have a 12 volt "ignition on" access terminal at the fuse box. Look for an unused male or female terminal and test it with a test light when the ignition is turned on. Not Helpful 0 Helpful 2. Why do the wires spark when I hook them up? Answer this question Flag as How do I hook up my car volt amp gauge to the amp? Include your email address to get a message when this question is answered. Already answered Not a question Bad question Other. Warnings Install a 4 amp fast-acting fuse to the red ammeter wire before hooking it up to the battery.


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Install a 1 amp fast-acting fuse to the red wire of the voltmeter before connecting to the volt terminal. Do not connect the ammeter or voltmeter across the battery. Things You'll Need Eye protection. Article Info wikiHow is a wiki similar to Wikipedia, which means that many of our articles are written collaboratively. Car Batteries and Ignitions In other languages: Did this article help you? Cookies make wikiHow better.

Part 2 of 2: Installing the gauge

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