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OK, working theory lesson is over, let's get testing in the next page. How to Replace a Ford F150 Fuel Pump Driver Module - YouTube Where is the fuel pump driver module located in the 2003 ford f150 () The fuel pump driver module on most ford pickup truck vehicles is located in line along the fuel line, against the crossbeam on the frame, sometimes covered by a spare tire. If the inertia switch has been tripped, it will ‘open’ the circuit and the voltage will not reach the fuel pump.Īs you can see, there's really nothing complicated happening behind the scenes with the fuel pump relay and the way it activates the fuel pump when you turn the key ON and start cranking the engine.
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Before this voltage reaches the fuel pump, it has to go through the fuel pump inertia switch first.Circuit 3 is the one that runs to the fuel pump (via the inertia switch) and delivers the voltage/current it needs to activate.This activates the fuel pump relay to pass current from circuit 4 to circuit 3.The fuel injection computer then Grounds circuit 1. just because you have a faulty Ford Explorer fuel pump on the inside Electrical components such as your map light.This voltage comes from the ignition switch.Power (in the form of 10 to 12 Volts) is applied to circuit 4.This voltage comes from the EEC Power relay.Power (in the form of 10 to 12 Volts) is applied to circuit 2. It is located in the relay and Maxi fuse box under the hood near the battery, both the fuel pump fuse and relay are in this box, the fuel pump fuse is a 20Amp and is marked 10, the fuel pump relay is is marked as relay 301.To get into more specifics, this is what happens when you turn the key and crank the engine: By ‘closing’ the high current circuit, I specifically mean allowing voltage to pass thru' the relay (internally) and on its way to the fuel pump. The low current circuit is the control circuit that ‘closes’ or ‘opens’ the high current circuit. In it's ‘open’ state current does not get sent to the fuel pump. This brand new TRE-385 OEM Replacement fuel pump is a direct fit replacement in the stock fuel pump housing (some minor modifications may be needed on the. When the fuel pump relay is off (not activating the fuel pump), the high current circuit is ‘open’. The high current circuit is the one that delivers the voltage (and thus current) to the fuel pump in the gas tank (or on the frame rail). clock spring and check Fuel pump inertia switch and reset button location.
#2003 FORD EXPEDITION FUEL PUMP LOCATION CODE#
Well, every Ford fuel pump relay has two basic circuits and for the purpose of our discussion, we'll call them:īoth of these are completely independent from one another, in other words, voltage/current flowing thru' these circuits don't mix. This Ford Escape delivers a Intercooled Turbo Premium Unleaded I-3 1 Code for. The core purpose of a relay is to control a high amount of current with a smaller (lower) current. Relay Basics: How The Fuel Pump Relay Works * Your specific Ford vehicle may have different colors. You will be able to use the info in this article to diagnose the fuel pump relay on your Ford vehicle even if the colors of the fuel pump relay connector's wires are different! Ford Fuel Pump Circuits This is no big deal, since the circuit descriptions are the same. IMPORTANT: Your specific Ford vehicle may not have the exact same colors listed below. The Ford fuel pump relay has 4 wires that connect to it.Įach wire has a specific job to do and these are their circuit descriptions:
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Manually open the throttle and spray starting fluid down the bore and then, quickly, reconnect the air duct to the throttle body (you don't have to tighten the Hose Clamp).
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The end that connects to the air filter box (or canister) can remain connected to it. ORIGINAL ENGINE MANAGEMENT Part # DR1039. Disconnect the air intake duct from the throttle body.The following tutorial may be of help: How To Test The Fuel Pump (Ford 4.9L, 5.0L, 5.8L) (at: ). If it has already been replaced with an after-market one, this relay won't be green, but will have a gray body. If your fuel injected Ford pickup, van, or car still has the Ford relay, this bad boy will be a green color (like the one in the image above). You'll be able to find out if the fuel pump relay, or the fuel pump inertia switch, or the fuel pump is the cause of the no-start condition on your Ford car or pickup. With the help of this ‘How To’ tutorial, I'll show you how to do it using only a multimeter. Instrument cluster.Testing the Ford fuel pump relay on the car is not that hard to do.