Glacier Diesel Power Rear Water-in-Fuel (WIF) Sensor Fooler | 2013–2018 Ram 6.7L Cummins
Description
Installing a complete aftermarket fuel filtration system often means removing the factory rear fuel filter housing—but doing so also removes the factory Water-in-Fuel (WIF) sensor.
On 2013–2018 Ram 6.7L Cummins trucks, the rear frame-mounted fuel filter assembly contains a Water-in-Fuel sensor that communicates with the truck's Powertrain Control Module (PCM). Once the factory filter housing is removed for the installation of a Glacier Diesel Power MK-2 Fuel Filter Kit, FASS®, AirDog®, or another custom filtration system, the disconnected sensor immediately triggers the Water in Fuel warning on the dashboard.
The Glacier Diesel Power Rear Water-in-Fuel Sensor Fooler is a simple plug-and-play solution that connects directly to the factory wiring harness and simulates the factory sensor, eliminating the nuisance warning light without cutting, splicing, or modifying the factory wiring. Installation takes only a few seconds and provides a clean, professional finish to your aftermarket fuel system.
Features
- Direct plug-and-play installation
- Eliminates rear Water-in-Fuel warning light
- No wire cutting or splicing required
- OE-style electrical connector
- Compatible with Glacier Diesel Power fuel filtration systems
- Compatible with FASS® and AirDog® fuel systems
- Weather-resistant construction
- Compact design for a clean installation
- Designed specifically for 2013–2018 Ram 6.7L Cummins trucks
Why Does the Rear Water-in-Fuel Light Stay On?
Beginning in 2013, Ram introduced a dual fuel filter system.
The rear frame-mounted assembly performs two important functions:
- Primary fuel filtration
- Water separation
It also contains a Water-in-Fuel sensor that continuously communicates with the truck's PCM.
When the factory filter housing is removed during an aftermarket fuel system installation, the PCM no longer receives the expected signal and assumes there's a fault, illuminating the Water-in-Fuel warning light.
The GDP Rear WIF Sensor Fooler restores the expected electrical signal, allowing the warning light to remain off after the factory housing has been removed.
Glacier Tech Tip
Many customers ask why there are two different WIF Foolers.
The answer depends on which factory filter assembly has been removed.
- Front WIF Fooler – Eliminates the warning generated by removing the factory engine-mounted fuel filter housing.
- Rear WIF Fooler – Eliminates the warning generated by removing the frame-mounted primary fuel filter and water separator found only on 2013–2018 trucks.
If your aftermarket fuel system removes both factory filter assemblies, you'll typically need both foolers to eliminate all Water-in-Fuel warnings and complete the installation properly.
Why Choose Glacier Diesel Power?
At Glacier Diesel Power, we don't just build filtration systems—we engineer complete installation solutions.
Our Rear Water-in-Fuel Sensor Fooler provides:
- Factory-style fit and finish
- Fast installation
- Reliable electrical connection
- No permanent vehicle modifications
- Clean engine bay and chassis appearance
Rather than leaving the original sensor zip-tied to the frame or hanging from the harness, this fooler provides a much cleaner, more professional solution.
Applications
Fits:
- 2013 Ram 2500 6.7L Cummins
- 2013 Ram 3500 6.7L Cummins
- 2014 Ram 2500 6.7L Cummins
- 2014 Ram 3500 6.7L Cummins
- 2014 Ram 4500 6.7L Cummins
- 2014 Ram 5500 6.7L Cummins
- 2015 Ram 2500 6.7L Cummins
- 2015 Ram 3500 6.7L Cummins
- 2015 Ram 4500 6.7L Cummins
- 2015 Ram 5500 6.7L Cummins
- 2016 Ram 2500 6.7L Cummins
- 2016 Ram 3500 6.7L Cummins
- 2016 Ram 4500 6.7L Cummins
- 2016 Ram 5500 6.7L Cummins
- 2017 Ram 2500 6.7L Cummins
- 2017 Ram 3500 6.7L Cummins
- 2017 Ram 4500 6.7L Cummins
- 2017 Ram 5500 6.7L Cummins
- 2018 Ram 2500 6.7L Cummins
- 2018 Ram 3500 6.7L Cummins
- 2018 Ram 4500 6.7L Cummins
- 2018 Ram 5500 6.7L Cummins
Compatible with:
- Glacier Diesel Power MK-2 Fuel Filter Kit
- Glacier Severe Service Fuel Filter Systems
- FASS® Fuel Systems
- AirDog® Fuel Systems
- Custom fuel filtration systems that remove the factory rear filter housing.
Important Notes
- Designed only for trucks that have removed the factory rear fuel filter and water separator assembly.
- Plug-and-play installation.
- No programming required.
- No cutting or splicing required.
- Intended for aftermarket filtration conversions—not as a replacement for a functioning Water-in-Fuel sensor on an otherwise stock fuel system.
- Verify which factory filter assemblies have been removed before ordering, as some trucks require both the front and rear WIF foolers.
Common Installation Issue
One of the most common questions after installing a FASS®, AirDog®, or Glacier Diesel Power fuel filtration system is:
"Why is my Water-in-Fuel light still on even though the truck runs perfectly?"
In most cases, nothing is wrong with the fuel system.
The warning light simply indicates that the factory rear Water-in-Fuel sensor has been disconnected. The GDP Rear WIF Sensor Fooler restores the expected signal, eliminating the nuisance warning and providing a clean, factory-quality installation without leaving unused sensors tied to the chassis.
Complete Your Fuel System
Complete your aftermarket fuel filtration upgrade with:
- Glacier Diesel Power Front Water-in-Fuel Sensor Fooler
- Glacier Diesel Power MK-2 Twin Fuel Filter System
- Glacier Severe Service Twin Fuel Filter System
- Fleetguard FS1001 Fuel & Water Separator
- Fleetguard FF5814 NanoNet® 3-Micron Fuel Filter
- Glacier Diesel Power Fuel Pressure Test Kits
- Glacier Diesel Power Fuel Pressure Test Fittings
- Glacier Diesel Power Fuel System Diagnostic Tools
A clean fuel system installation shouldn't leave you with warning lights or improvised wiring. The Glacier Diesel Power Rear Water-in-Fuel Sensor Fooler provides the finishing touch by eliminating unnecessary dashboard warnings while preserving a clean, professional installation that looks as good as it performs.
Glacier Diesel Power Rear Water-in-Fuel (WIF) Sensor Fooler | 2013–2018 Ram 6.7L Cummins
Description
Installing a complete aftermarket fuel filtration system often means removing the factory rear fuel filter housing—but doing so also removes the factory Water-in-Fuel (WIF) sensor.
On 2013–2018 Ram 6.7L Cummins trucks, the rear frame-mounted fuel filter assembly contains a Water-in-Fuel sensor that communicates with the truck's Powertrain Control Module (PCM). Once the factory filter housing is removed for the installation of a Glacier Diesel Power MK-2 Fuel Filter Kit, FASS®, AirDog®, or another custom filtration system, the disconnected sensor immediately triggers the Water in Fuel warning on the dashboard.
The Glacier Diesel Power Rear Water-in-Fuel Sensor Fooler is a simple plug-and-play solution that connects directly to the factory wiring harness and simulates the factory sensor, eliminating the nuisance warning light without cutting, splicing, or modifying the factory wiring. Installation takes only a few seconds and provides a clean, professional finish to your aftermarket fuel system.
Features
- Direct plug-and-play installation
- Eliminates rear Water-in-Fuel warning light
- No wire cutting or splicing required
- OE-style electrical connector
- Compatible with Glacier Diesel Power fuel filtration systems
- Compatible with FASS® and AirDog® fuel systems
- Weather-resistant construction
- Compact design for a clean installation
- Designed specifically for 2013–2018 Ram 6.7L Cummins trucks
Why Does the Rear Water-in-Fuel Light Stay On?
Beginning in 2013, Ram introduced a dual fuel filter system.
The rear frame-mounted assembly performs two important functions:
- Primary fuel filtration
- Water separation
It also contains a Water-in-Fuel sensor that continuously communicates with the truck's PCM.
When the factory filter housing is removed during an aftermarket fuel system installation, the PCM no longer receives the expected signal and assumes there's a fault, illuminating the Water-in-Fuel warning light.
The GDP Rear WIF Sensor Fooler restores the expected electrical signal, allowing the warning light to remain off after the factory housing has been removed.
Glacier Tech Tip
Many customers ask why there are two different WIF Foolers.
The answer depends on which factory filter assembly has been removed.
- Front WIF Fooler – Eliminates the warning generated by removing the factory engine-mounted fuel filter housing.
- Rear WIF Fooler – Eliminates the warning generated by removing the frame-mounted primary fuel filter and water separator found only on 2013–2018 trucks.
If your aftermarket fuel system removes both factory filter assemblies, you'll typically need both foolers to eliminate all Water-in-Fuel warnings and complete the installation properly.
Why Choose Glacier Diesel Power?
At Glacier Diesel Power, we don't just build filtration systems—we engineer complete installation solutions.
Our Rear Water-in-Fuel Sensor Fooler provides:
- Factory-style fit and finish
- Fast installation
- Reliable electrical connection
- No permanent vehicle modifications
- Clean engine bay and chassis appearance
Rather than leaving the original sensor zip-tied to the frame or hanging from the harness, this fooler provides a much cleaner, more professional solution.
Applications
Fits:
- 2013 Ram 2500 6.7L Cummins
- 2013 Ram 3500 6.7L Cummins
- 2014 Ram 2500 6.7L Cummins
- 2014 Ram 3500 6.7L Cummins
- 2014 Ram 4500 6.7L Cummins
- 2014 Ram 5500 6.7L Cummins
- 2015 Ram 2500 6.7L Cummins
- 2015 Ram 3500 6.7L Cummins
- 2015 Ram 4500 6.7L Cummins
- 2015 Ram 5500 6.7L Cummins
- 2016 Ram 2500 6.7L Cummins
- 2016 Ram 3500 6.7L Cummins
- 2016 Ram 4500 6.7L Cummins
- 2016 Ram 5500 6.7L Cummins
- 2017 Ram 2500 6.7L Cummins
- 2017 Ram 3500 6.7L Cummins
- 2017 Ram 4500 6.7L Cummins
- 2017 Ram 5500 6.7L Cummins
- 2018 Ram 2500 6.7L Cummins
- 2018 Ram 3500 6.7L Cummins
- 2018 Ram 4500 6.7L Cummins
- 2018 Ram 5500 6.7L Cummins
Compatible with:
- Glacier Diesel Power MK-2 Fuel Filter Kit
- Glacier Severe Service Fuel Filter Systems
- FASS® Fuel Systems
- AirDog® Fuel Systems
- Custom fuel filtration systems that remove the factory rear filter housing.
Important Notes
- Designed only for trucks that have removed the factory rear fuel filter and water separator assembly.
- Plug-and-play installation.
- No programming required.
- No cutting or splicing required.
- Intended for aftermarket filtration conversions—not as a replacement for a functioning Water-in-Fuel sensor on an otherwise stock fuel system.
- Verify which factory filter assemblies have been removed before ordering, as some trucks require both the front and rear WIF foolers.
Common Installation Issue
One of the most common questions after installing a FASS®, AirDog®, or Glacier Diesel Power fuel filtration system is:
"Why is my Water-in-Fuel light still on even though the truck runs perfectly?"
In most cases, nothing is wrong with the fuel system.
The warning light simply indicates that the factory rear Water-in-Fuel sensor has been disconnected. The GDP Rear WIF Sensor Fooler restores the expected signal, eliminating the nuisance warning and providing a clean, factory-quality installation without leaving unused sensors tied to the chassis.
Complete Your Fuel System
Complete your aftermarket fuel filtration upgrade with:
- Glacier Diesel Power Front Water-in-Fuel Sensor Fooler
- Glacier Diesel Power MK-2 Twin Fuel Filter System
- Glacier Severe Service Twin Fuel Filter System
- Fleetguard FS1001 Fuel & Water Separator
- Fleetguard FF5814 NanoNet® 3-Micron Fuel Filter
- Glacier Diesel Power Fuel Pressure Test Kits
- Glacier Diesel Power Fuel Pressure Test Fittings
- Glacier Diesel Power Fuel System Diagnostic Tools
A clean fuel system installation shouldn't leave you with warning lights or improvised wiring. The Glacier Diesel Power Rear Water-in-Fuel Sensor Fooler provides the finishing touch by eliminating unnecessary dashboard warnings while preserving a clean, professional installation that looks as good as it performs.