Steps: 1. Also, with the average fuel pump replacement cost between $300 and $700 dollars, making sure the wiring is functioning properly is essential. The best way to avoid this is to wire the fuel pump to have a dedicated voltage line right off the battery so that it consistently performs. ... Connector Fuel Pump Harness Pigtail For Audi A4 S4 B5 A6 4-way 4 pin. Fuel Pump Circuit Wiring Diagram (1996-1998 1.6L Honda Civic). Clicking this will make more experts see the question and we will remind you when it gets answered. Discussion Starter • #1 • Sep 24, 2009. can anybody help me please i got my motor to turn over but the fuel pump has no power. Makes things easier as well as harder. Discover (and save!) on your web site it shows this diagram with #85 going to ground. In fact you should be using appropriately sized wire for all of this. You can find the PGM-FI Main Relay test tutorial here: How To Test The PGM-FI Main Relay (1996-1998 1.6L Honda Civic). Relay easy step by step electrical wiring. Example:  - If you take #85 to ground than make #86 your 12v signal in. Special thanks to: “Thank you, for the info, on your site, on how to remove valve springs, and install stem seals, using normal shop tools. IF you ran large enough wire and a relay to handle the current (amps) of both pumps than you would run the 12v out of the relay to both pumps to turn them on simultaneously. Find a 12v source capable of supplying at least 15 amps such as a terminal block on the firewall or even directly to the battery. Discover (and save!) 'params' : {} Otherwise, the structure won’t function as it ought to be. Use the red fuel pump wire from the computer to activate the relay through pin 86. Fuel pump Relay: On 91 cars, it is located under the driver's seat. I am not getting any voltage to the pump. Thanks 85 and 86 are the relay coil. Fuel Pump Wiring Diagrams for 1994 Chevrolet/GMC Pickups With an Automatic or Manual Transmission. So I just got my 2003 Silverado fuel tank back from Aeromotive with dual 340 LPH pumps. The relay you need should be a four-prong relay with at least 14-gauge wiring. Here is a picture gallery about relay 4 pin wiring diagram complete with the description of the image, please find the image you need. At the wiring you need to find the 12v supply wire from the ECU to the fuel pump. All Rights Reserved, For the latest Automotive news and stories visit the websites below. Order fuel pump wiring harness for your vehicle and pick it up in storemake your purchase find a store near you and get directions. : "http://www. This typical circuit diagram of the fuel pump circuit applies to the gasoline 1993, 1994, and 1995 Ford F150, F250, and F350 equipped with a gasoline 4.9L, or a 5.0L, or a 5.8L engine and dual fuel tanks.. 4.7 out of 5 stars 60. Okay, so it would appear that I was right on my initial post about which Fuel Pump Relay pin gets the signal from the ECM. Being that pin 86 is wired straight to the battery this will send a nice, clean voltage straight to the battery with no other obstructions to the fuel pump. See the diagram to help identify the fuel pump relay wiring colors. The fuel pump relay is under the hood right next to the fuel pump fuse, both are clearly marked. The PGM-FI Main Relay is the component that supplies 12 Volts to the fuel injection system. Page 1 of 2: 1994 Fuel Pump Circuit Tests (GM 4.3L, 5.0L, 5.7L). The diagram is color coded per circuit and only a few things may need to be said. Thank you for showing the REAL easy way, and saving me some money.”   Joe S. “Hello there, Just think about when you have the radio turned up, or running the high beam lights, or maybe when the alternator starts to weaken. Jun 13, 2019 - This Pin was discovered by Randy Beltz. ALLMOST 40205G Electric Fuel Pump Harness and Relay Wiring Kit NEW. }; Run a wire from pin 87 to your factory wire that you cut that runs to the fuel pump. Wire pin 86 to a good ground on the car. The diagram is color coded per circuit and only a few things may need to be said. If this is too much for you, this modification has become so important that companies sell ready to wire kits: If you have any more questions on how to do this particular modification to your cars factory wiring harness, click the contact us button and send us an email. Once that wire has been found cut that wire so that you now have half of that wiring running to the fuel pump, and the other half running to the factory ECU. Once the car is shut off, pin 85 will lose its 12 volts causing the coil inside the relay to close and the light switch will then be turned off cutting the continuity between pins 30 and 87, which will then cut the voltage supply to the fuel pump. thanks. I think you will find that you need a new pump and a new fuel pump connector at the fuel tank. Does anyone know of any wiring issues, fuses, relays etc. 4 or 5 pin relay with or without a diagram duration. For vehicles that won't start (out of gas) or have a dead battery (fuel pump runs after turning vehicle off). Each component should be placed and connected with different parts in particular way. 1986 Ford F250 Wiring Diagram Weight Corsa D Pasticceriagele It. Fuel pump relay wiring diagram. 23 Posts . 4 Prong Relay Wiring Diagram – 4 pin flasher relay wiring diagram, 4 pin relay wiring diagram 24v, 4 pin relay wiring diagram fan, Every electrical structure consists of various unique pieces. They are usually labeled 30, 85, 86, and 87. Fuel Pump Relay Wiring Diagram. Thanks. Peace” Jay R. Copyright 2010 Engine Basics.