maxtow MT-DV11 Fuel Pressure Gauge Instruction Manual
- June 4, 2024
- maxtow
Table of Contents
maxtow MT-DV11 Fuel Pressure Gauge
Fuel Pressure Gauge
The following instructions are for the installation of your Fuel Pressure Gauge. Before you begin, lay out all items and ensure there are no missing parts. If any items are missing, please STOP immediately and contact MaxTow Gauges.
What’s Included
- Fuel Pressure Gauge
- 1/8-27 NPT Fuel Pressure Sensor
- 9ft Sensor Harness
- 5ft Power Harness
- Visor and Mounting Bracket
Wiring Schematic
- Red: 12v Constant Source (+)
- White: 12v Ignition Switched Source (+)
- Orange: 12v Headlight Switched Source (+)
- Black: Vehicle/Engine Ground (-)
Disconnect negative battery terminals before starting any work on the vehicle.
Fuel Pressure Gauge
There are several different ways to connect a Fuel Pressure Gauge to your
vehicle. In most cases an adapter is needed to adapt the 1/8-27 NPT Sensor to
your fuel system. Please take a look at MaxTow.com for available adapters
including Thread Adapter, Banjo Bolts, Fuel Rail Adapters, T-Fittings and Big
Line Kits.
On Dodge Cummins applications it is required to install a Snubber Valve inline
with the Pressure Sensor in order to protect the sensor from pressure spikes.
On Duramax Applications it is required to have an aftermarket lift pump
installed in order to have fuel pressure.
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Find the location you wish to install your Pressure Sensor and have the adapter ready, (if needed). Common sensor install locations include the Fuel Rail, Fuel Filter Housing, Lift Pump and Fuel Line.
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Place a Catch Pan in the area that you will be working in order to catch any lost fuel.
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Drain the Fuel Bowl or Filter Housing if applicable.
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Remove any plugs or valves needed to gain access to the pressure port.
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Install the sensor into the desired location and tighten using a 22mm wrench.
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Plug the Fuel Pressure Sensor Harness into the sensor and route through the engine bay, through the firewall, using a grommet, keeping it clear of any moving parts, heat sources, and kinks. An extended harness is available on MaxTow.com if the included harness is not long enough.
Note: Be sure to use a grommet when routing the Harness through the firewall to protect it from being cut or damaged. If one is not available you will need to drill a hole and install a grommet. -
Plug the Fuel Pressure Sensor Harness into the back of the Fuel Pressure Gauge.
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Before the engine is able to be started, be sure to bleed off any air that may be in the system following the manufacturer’s recommended procedures.
Gauge Wiring
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With your Fuel Pressure Sensor Harness connected, plug in the power harness and place the gauge in the mounting location.
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In order to test for power, reconnect the Negative Battery Terminal.
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It may be necessary to remove the Vehicle Trim and/or Kick Panels in order to gain access to the vehicle’s Fuse Box.
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Using a test light, locate a constant 12-volt power source in the vehicle’s fuse panel that receives 12- volt power when the ignition is turned off. You can splice into the circuit or use an optional Expandable Circuit. Connect the Red Wire of the gauge to the Constant 12-volt power source.
Note: It is required to use an automotive grade 18-20 gauge wire and proper splice connectors when extending any of the power wires. -
Repeat the same step for the White Wire of the gauge to locate an Ignition Switched 12-volt power source. This source should not have any power with the key turned off and have 12- volts with the key turned on.
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Connect the Orange Wire of the gauge to the positive Headlight Switch Power Source using a Splice Connector at the headlight switch. You can also use an Expandable Circuit and install into the fuse box if you have a fuse available. This will allow the gauge face to dim 30% when the headlights are turned on.
Note: Make sure that the connection source does not dim. If the voltage is reduced when you lower the Dimmer Wheel it will cause the gauges to flash from not having enough voltage. -
Locate a clean, reliable grounding source and connect the Black Wire from the gauges.
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After all wiring is complete, turn the vehicle’s key to the “On” position and confirm that your gauges illuminate.
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Turn on the headlights to ensure that the gauges are dimming.
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Start vehicle and check for leaks.
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Reinstall any panels that may have been removed.
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Test drive your vehicle to ensure all gauges are functioning properly.
Selectable Brightness Levels
The Double Vision Gauge Series features 3 selectable brightness settings for
both day and nighttime lighting modes. Below are the instructions on how to
program each lighting mode.
Daytime Mode
- Press and hold the button located on the gauge face until a “d1” appears in the digital display.
- Press the button again to cycle through the 3 dimming modes.
- Press the button until you have selected your desired setting. Do not touch the button for 5 seconds and the gauge will save your selection.
Nighttime Mode
- This mode is only available if the orange dimmer wire is connected and your headlights are powered.
- Press and hold the button located on the gauge face until an “n1” appears in the digital display.
- Press the button again to cycle through the 3 dimming modes.
- Press the button until you have selected your desired setting. Do not touch the button for 5 seconds and the gauge will save your selection.
Additional Information
- The supplied optional gauge visor is intended to be placed on the gauge so that the thickest part is at the top, creating a cover over the gauge to help keep sun glare off of the gauge face.
- The included mounting bracket is designed to be used on a flat universal-style mount in order to keep the gauge secure. In some cases one or both legs of the bracket may need to be modified to fit the thickness and contour of the mount. Our A-pillar gauge pods do not require the use of the mounting bracket but can be used if you desire, and there is enough space to fit it between the gauge and the gauge pod. When installing the bracket onto the gauge, make sure not to over-tighten as it could pull the rear studs on the back of the gauge and damage it.
- MaxTow Gauges Installation Instructions: Installation documents are solely to provide a guide for individuals that are mechanically and electronically able to install products. If you are unsure about the correct procedure of installation for a product, you should consult a licensed professional.