1991 Jeep Wrangler Fuel Pump Wiring Diagram

By | November 30, 2017



Exploring the 1991 Jeep Wrangler Fuel Pump Wiring Diagram



The 1991 Jeep Wrangler was designed to be an intimidating and unstoppable vehicle, capable of traversing any landscape with ease. But in order to keep it running at peak capacity, all wiring – including the fuel pump wiring – must be kept in optimal condition.



At first glance, the task of troubleshooting the fuel pump wiring may seem daunting. But with the right tools and information, this job can become much more streamlined. This article will serve as a guide to understanding the 1991 Jeep Wrangler fuel pump wiring diagram, its components, and the steps necessary to check any anomalies.



Understanding the 1991 Jeep Wrangler Fuel Pump Wiring Diagram



Your 1991 Jeep Wrangler fuel pump wiring diagram is composed of two main components: the internal wiring and the external wiring. Internal wiring includes the following elements: a forty-two inch fuel line, a positive pressure line, a fuel filter, the fuel injectors and their sensors, the fuel pump itself, and the Vehicle Control Module (VCM). External wiring involves any power sources and the relay.



It is important to note that the fuel pump has two electric connectors that are connected to the internal wiring system. The first connector is the Positive Pressure Line, which is usually located on the left side of the fuel tank. The other connector is the Negative Pressure Line, typically found on the right side of the fuel tank. Both of these wires should be connected to the Vehicle Control Module (VCM).



Using the 1991 Jeep Wrangler Fuel Pump Wiring Diagram for Troubleshooting



To troubleshoot any anomalies regarding the fuel pump wiring, you will need to visually inspect the diagram and its components. If you are unsure of anything, be sure to refer to the manufacturer's repair manual. Once you are sure that the internal and external wiring of the fuel pump is installed correctly, the next step is to test the power supply and fuel pressure side. You can use a Multi-meter to check if there is voltage present between the Pin 1 (Positive Pressure Line) or Pin 2 (Negative Pressure Line) on your VCM.



If the voltage is present, then the fuel pump wiring is working properly and the anomaly is elsewhere. However, if the voltage is not present, then you may need to inspect the electrical connectors, verify the connection between the fuse box and the relay, and check the fuel pressure regulator and injector. After making any repair, you should make sure to re-test the voltage to ensure that the fuel pump is operating properly.



Conclusion



A thorough understanding of the 1991 Jeep Wrangler fuel pump wiring diagram is necessary for proper maintenance and troubleshooting of the system. This article serves as a guide to help ensure your knowledge of the system and how to interpret the wiring diagram for successful troubleshooting.


Fuel Guage Non Functional I Need A Wire Diagram Of System And Some Cures Short Tank Removal To Access Send Unit

Fuel Guage Non Functional I Need A Wire Diagram Of System And Some Cures Short Tank Removal To Access Send Unit


Fuel Pump Won T Turn On Jeep Cherokee Forum

Fuel Pump Won T Turn On Jeep Cherokee Forum


Wiring Diagrams

Wiring Diagrams


Wire Harness Installation Instructions

Wire Harness Installation Instructions


How To Jumper Your Fuel Pump Jeep Wrangler Yj Forum

How To Jumper Your Fuel Pump Jeep Wrangler Yj Forum


Jeep Tj Wrangler Fuel Parts Best Reviews S At 4wp

Jeep Tj Wrangler Fuel Parts Best Reviews S At 4wp


Main Use Of These 2 Diffe Relays Jeep Cherokee Forum

Main Use Of These 2 Diffe Relays Jeep Cherokee Forum


I Have A 91 Wrangler 4 0 That Starts And Then Cuts Out

I Have A 91 Wrangler 4 0 That Starts And Then Cuts Out


Jeep Wrangler Instrument Cer Manual Jedi Com

Jeep Wrangler Instrument Cer Manual Jedi Com


95 Yj Fuel Gauge To Sender Wiring And Testing Jeep Enthusiast Forums

95 Yj Fuel Gauge To Sender Wiring And Testing Jeep Enthusiast Forums


How To Check Fuel Pump Fuse Helpful Guide With Pics Rustyautos Com

How To Check Fuel Pump Fuse Helpful Guide With Pics Rustyautos Com


Answered 1991 Jeep Grand Eer Questions Issues Fixya

Answered 1991 Jeep Grand Eer Questions Issues Fixya


Fuel Pump Wiring Diagram Was Told By Garage That My Wife 39

Fuel Pump Wiring Diagram Was Told By Garage That My Wife 39


Pin On 1987 Jeep Yj

Pin On 1987 Jeep Yj


Cherokee Fuel Pump Relay Wiring Diagram And Ignition Switch

Cherokee Fuel Pump Relay Wiring Diagram And Ignition Switch


Jeep Yj Wrangler 4 2l 6 Cylinder Engine Parts 4wd Com

Jeep Yj Wrangler 4 2l 6 Cylinder Engine Parts 4wd Com


Wiring Diagrams 1984 1991 Jeep Cherokee Xj Online Manual

Wiring Diagrams 1984 1991 Jeep Cherokee Xj Online Manual


2003 Jeep Wrangler Tested Starting Fluid To See If Fuel Pump

2003 Jeep Wrangler Tested Starting Fluid To See If Fuel Pump