Thank you in advance JeffThe reason the pump still runs with the plunger up is because someone cut the B/P and B wires and tied them together so they don't go through the inertia switch anymore. I have replaced both the ecm relay and the fuel pump relay. 8L 132,200 miles. Location: Marlboro Mental Hospital. If it acts like it's starved for fuel, it probably is related to that. he got the truck for free it was driven to california and back from cour de alene twice then parked last winter. 98 but, the battery is a little weak and cold after giving it a little charge it did go up a little over the 12 volts I checked the brown/pink wire recently and it was about 12 volts before cranking then dropped to 10 when cranking. If not check the fuel pump fuse and fuel pump relay, in the under hood fuse/relay box. The inertia switch is located on the LH side of the vehicle behind the trim panel which is behind the rearmost seat on Escort/Lynx, Exp. When you put the jumper in the inertia switch connector, did you check it with the test light. 2. Wiki User. The easiest way to bypass the inertia switch is to just cut the wires at the plug and splice them together. No fuel pump and no power to wire at inertia switch. The fuel pump shut-off switch is located behind an access panel on the right side of the luggage compartment. I tried a couple more times to the same result sputter and. This little black box is designed to function flawlessly forever (or close to it), so it's easy to forget it's there. If the relay is clicking and the fuse is good, I believe you will see the 12v for 2 seconds, as mentioned above, on at least one terminal of the inertia switch and that means the relay is good. I need a fuse box diagram of a 98 ford explorer. inertia switch is driving me crazy. . Pull the connector off of the inertia switch & test for voltage on both wires. I was trying to start the car earlier. The part has a reset button on it. Do. It is not supplying power to the fuel pump in this position. I realize I have 2 of these. The power for the fuel pump relays contact common comes from a fuse link at the starter solenoid battery side. 8 L idle for several minutes, because prior to changing the switch my car idle ok and then it would start to sputter and st. The manual shows one at the location I told you. Its purpose is to shut off the fuel pump (s) in case of an accident, thus preventing fuel from being pumped all over the. CERTIFIED MECHANIC. Home. good. It has 3 – Fixya. The relay sends power to the inertia switch. 1. If it doesn't pull down, it will stay up (forward) as the frame retracts and get jammed up in the rest of the frame. Our Inertia Activated Fuel Pump Shut-Off Switch cuts power to an electric fuel pump after an impact of 10 - 12 G's or higher to reduce the risk of post-crash fires. Push the "button" in. Open the front passenger door and remove the small access. Inertia Switch location 1996 F150???? by fisherf150 » Thu Apr 12, 2007 2:52 pm. NOTE: In the reset position, the button can be pressed an additional 1. The initial power up you hear is a prime function that all vehicles have. If the inertia switch is faulty then also fuel pump will not start. Most people didn't know why the car was a crank-no start, where the switch was, and that there was a button on top for resetting the switch. These are usually located behind one of the front floor kickpanels. One of the least appreciated components in your fuel injection system is the fuel pump inertia switch. This inertia switch is mechanical, resembling a 19th century clockwork mechanism, which is susceptible to shock and vibration. Log In; Register; Forums. 73 Ford Bronco: I put in a 5. According to my Actron code scanner manual, code 542 is (Fuel pump. If your Ford ever fails to start or stalls on you suddenly, the first thing to check is the inertia fuel shut-off switch. The wiring diagram does not show it. Once the switch has been tripped, it must be reset manually in order to start the engine. To bypass the computer just ground pin #6 of the EEC self-test plug and turn on the key. This unique kit was designed by Ford Engineering to provide all dealers access to all theI want to find the fuel inertia switch to splice a hidden toggle switch into the circuit either before or after the switch . RESETTING THE SWITCH. Access is gained through a hole in. Automotive Instructor. Right now the truck's engin is tirning over but will not start. The inertia switch is either in the trunk or by your right foot on the passenger side in the plastic kick panel. i think the inertia switch has to be "up" when the car is running. Posted on Apr 18, 2010the fuse to the fuel pump relay. step 1 :Resetting the Inertia Switch. Your vehicle has an inertia switch, which is located on the tow board to the right of the transmission pump. The relay should either be in the Black powerbox group or in with the fuseholders. Connect the fuel pressure gauge to the Schrader valve on the fuel rail. Thanks for the battery solution. Feb 25, 2018. It has made driving the truck completely unreliable, you never know when the switch is going to fail internally again. automotive. Hobosam21 Discussion starter. Intermittently, the truck will not start, even though it cranks fine. 2009 - 2014 Ford F150 - inertia safety switch - my 2014 f150. Remove the column from the truck, on the ignition switch you will see where the two shear bolts screw the assembly together, center punch the center of each bolt. The location of this switch varies even year to year. To test it you would have to check the wires going into it for power or ground because the wires will be live if the ignition switch is in the run position and the fuses are good. 25629 posts · Joined 2001. Occasionally a Ford vehicle would be towed in that would not start because the inertia switch needed to be reset. Top. Reasons for a Rough Idle or High RPM. JD1964. your issue is elsewhere. I don't have an exact link but it was. Again, check for leaking fuel. One of the most common was in trunk, behind side panels, usually drivers side. 0L V6, same a like Ranger XLT and I am having problem with the Fuel Pump Inertia switch, it's faulty, sometime completes the circuit and sometime fail even with the reset is down. "Yes" you potentially have power to the inertia switch if a) the computer has signaled the relay to close b) the relay has closed c) there is power to the relay on 30 d) the relay is good and it is closed e) there is a good connection at the socket to the wire at 87 and the wire is not broken. Basically no fuel pump power, see below. How To Fix It:. 2. These devices are essentially circuit breakers that sit inside you car's airbag control module's inertia switch, which is supposed to trigger when the vehicle comes to a sudden stop. When the reset button is pushed in (or down), then the inertia switch will let the voltage flow to the fuel pump. read more. Top. I. With the inertia switch in the open position, the red button is raised up. Up towards your engine there is a little black and red box, its pretty small, and it has like a button on. The Inertia sensor is suppose to disengage the fuel pump power when it detects accident vibrations. 660 satisfied customers. Disconnect the air intake duct from the throttle body. Ford in particular is well known for their unique placement of this switch. The fuel pump will come on then, shut off when the key is placed in the ON position, this is normal. Images (Click to make bigger) Was this. If you hear the fuel pump in the gas tank run, the Inertia Switch and fuel pump are likely fine. Near the park brake assembly If the truck has a diesel engine then the shut off solenoid is located in the top of the injection pump. Share. #1. Check if this fits your Ford F150. Browse Categories Answer Questions . I have a '97 B4000SE 4. The inertia switch for a ford f150 is located on the front part of the passenger door, behind the footwell cover, which is underneath the glove box. The button needs to be pointing up. 7 people found this helpful. RESETTING THE SWITCH. at top area of transmission where the shifter cable attaches to lever and shaft @ base of shaft is gear selector/nuetral safety switch remove nut on end of shaft and usually 3 - 8mm screws holding switch down ,unplug electrical connector,remove lever from shaft and raise. My kid had a '92 Ford Escort about 20 years ago. Not sure on cutaway chassis or '96, but earlier Econolines the fuel pump inertia switch was located on right side, just at bottom & forward of dash/knee panel, ahead of door opening. You may need to turn the ignition key to the on or accessory position to energize the module and reset the switch. I want to replace the fuel filter, but I remember someone telling me to release the fuel pressure before changing the fuel filter. but there is nothing in the spot where the fuel switch is supposed to be, if it is supposed to be directly under the sticker. Odds are the real inertia switch is still back there. Car cranks but no start, when i turn ignition on there is no fuel pump prime noise. It's classed as a crash sensor. OWNER/MECHANIC. Ford trucks usually have a switch on the inside firewall that shuts off fuel pump in the event of a wreck. #2 behind the left front kick panel cover. No-Start Condition. Only when it trips is there resistance, otherwise its loose. Looking at the fuel system, there was a pump relay, the inertia switch, and a few connectors. Is the inertia switch supposed to be up or down? On the top of the inertia switch is a red button. You may need to turn the ignition key to the on or accessory position to energize the module and reset the switch. - sprayed water at various locations under the hood and bed, since the. Fuel pump, inertia switch, fuel relay and computer connectors. Ford Truck Enthusiasts Site Navigation. The book I have is a Haynes manual for the Bronco and Pick-up trucks from 1980-1996. I found what I believe is the "inertia switch". BLUELIGHTNIN6. 2003. What I did was pop the little button up, then crank it over won't start. fender well. On the 2000-2011 Ford Focus, the fuel pump shut-off switch is located in the front passenger’s footwell, behind the kick panel access cover. Business, Economics, and Finance. O. I have replaced both the ecm relay and the fuel pump relay. . What does a Ford inertia switch do? The inertia switch is a safety item incorporated by Ford in the fuel system of its vehicles. Nothing, no continuity. It shuts off the fuel pump andINERTIA SWITCH ABSTRACT An inertia switch for sensing shock or vibra-tions imparted to an object to which said switch is secured. So if the switch is in position 2, once the ignition goes to the start position the horn. The fuel pump comes. Ford Truck Enthusiasts Site Navigation. 8, and am having issues with the inertia switch. Press the pedal and see. If it does NOT start, it probably has NO SPARK. 99,11. Press on the red plunger to reset it to the closed position. Push the button on the inertial switch; it should be clearly marked as the fuel pump reset, and may be in a contrasting color to the case. ----- The fuel pump relay on a 1995 Ford Explorer is in the power distribution box, in the engine compartment, driver's side near the firewall. I suspect the fuel pump is bad. 2009 crown Victoria p71. 1:42. A faulty IMRC valve can cause engine performance problems such as a rough running engine and lack of power. It is not possible to restart the engine until the inertia switch is manually reset. Then you would test the wires coming out which would work if the switch is reset. This is supposed to be for a Ford. It is not supplying power to the fuel pump in this position. Likes: 0. If you want to test the switch, unhook the wires going to it and unbolt it from the firewall. That will do the same thing as tripping the inertia switch. 1947 and Older Ford Trucks; Bronco. #9. side fender is you should find the fuel pump relay. I think maybe its something else causing it not to start after a serious collision. The power feed pins are pins 85 and 87. 3) Vacuum Leak. stlkikn Sr. Black is ground. I had a car accident with my 1. Ford is the only manufacture that uses that. Subford beat me to it. Had to reset it to be able to start again. #2. Besides the Inertia switch you can test the fuel pressure port on the fuel rail. Replaced in tank pump and both filters, high pressure pump. A KOEO 542 engine no start code is: DTC 542 indicates that one of the following has occurred: No Start: Inertia Fuel Shutoff (IFS) switch not reset or electrically open (if in secondary circuit). 5 posts · Joined 2015. 1. also there is a low pressure pump in the fuel tank that can cause fuel loss. Join the Elite Explorers for $20 each year. An open palm hit to a rear quarter panel of a Ford (1980s) was enough to trip an inertia switch and disable the fuel pump. Joined: Tue Jan 13, 2009 9:21 pm. Ford Master. Top. This is definitely not a normal situation. Sep 29, 2014. 2. 5? The scuttle on the net is that the Fusion no longer has an inertia switch, and that fuel shutoff in an accident is handled by an accelerometer in the Restraints control module. How do you change the inertia switch on a 1999 ford escort zx2 or reset one? You can reset one by pushing the button down. I wanted to test the voltage at the inertia cut-off switch which is supposed to be under the dash, but I cant find it. S. Connect the fuel pressure gauge to the Schrader valve on your 3. your issue is elsewhere. This is a normal condition. I pulled the inertia switch and now the car won't start. I found what I believe is the "inertia switch". you should have current (12 volts) on both sides of the fuse that works the tailights. The design of the fuel pump inertia switch causes it to turn off the fuel pump if a vehicle is involved in an accident. You may need to pull the carpet down and away from the instrument panel in order to access the switch. Pushing in the Fuel pump shut-off (inertia) switch. Then it stopped working again so I replaced the inertia switch with a new one from the Ford Dealership. For the past few months while driving the Truck, it would hesitate from time to time and buck. so i wanted to ck. Most likely culprit would be the inertia switch itself simply needs replaced here is the location is the diagrams below. If not, look for a bad PCM power relay OR a bad fuel pump relay OR a bad PCM. Turning off power to the electric fuel pump under these circumstances will prevent fuel from being sprayed over the vehicle. The inertia fuel shutoff switch is located behind the driver side scuff panel. Only when it trips is there resistance, otherwise its loose.