20 Most Recent 2004 Ford F-350 Super Duty Questions & Answers


Good question! Have you been using any odd biofuel? this is probably the first thing Ford will ask you .In 40 years of fixing cars, I never had this problem.

2004 Ford F-350... | Answered on Mar 07, 2015


You can find the code as it is printed on a sticker on the control box.
It will be up under the center part of the dash, about where the transmission tunnel meets the firewall. You have to reach up in there and pull back the carpet and insulation to find the box which has the 5 digit code printed on it.

2004 Ford F-350... | Answered on Feb 25, 2015


It is in the Auxiliary relay box #1 driver side under the hood
middle of the fender .

2004 Ford F-350... | Answered on Jan 26, 2015


12 volt test light or amp gauge. Trailer brakes use 2 wires... 1 ground and 1 hot. The hot has varied amps to apply according to the controller. 12 volt test light works great. use the white (typical) as your ground and the blue (typical) as your hot. Apply brakes. Light should get brighter as the controller is turned up and dimmer as it is turned down. I hope this helps.

2004 Ford F-350... | Answered on Jun 27, 2014


are the brakes on the trailer stuck on , even partially , is the trailer too heavy for the vehicle ? if all this ok i'd check the water pump is ok on your truck, as the extra power needed for towing , will put extra strain on all ancirally components , ie drive belts , water pump , alternator, keep me posted if you wish

2004 Ford F-350... | Answered on Jun 11, 2014


Check to make sure the bulb sockets are tight and free of corrosion. Moisture will often get inside. If this is not the culprit, grab a multimeter and make sure you have a good ground.

2004 Ford F-350... | Answered on Mar 28, 2014


If the brake pedal is pressed, you should read 12 volts on pin 3 of the 7-pin tow connector.(DK BLU wire).

2004 Ford F-350... | Answered on Mar 27, 2014


The replacement cabin air filter may have been installed backwards.

Ford F-350 Super... | Answered on Feb 03, 2019


I have replaced one in my ford exp. It was easy but mine was toward front of engine and easy to get to. I am not sure where #10 is on your 350.

Ford F-350 Super... | Answered on Apr 11, 2014


Google the question & read up on it

Go to You Tube Video & watch

All your questions are on the internet

Won't be easy, unless you have to experience &
touch of a machinist

Look at the tool required on the net & see how it is used

Ford F-350 Super... | Answered on Apr 11, 2014


Mr. Harris, My advise is to drain the water and fuel mixture from your fuel tank,remove if is easy the fuel tank and completely dry it up,Go by the engine bay and find the fuel pipe which is coming from the tank to the injection system where probably is a fuel filter,renew the fuel filter, blow air in the pipe from the engine side towards the fuel tank-but before you do blow air in the pipe be sure is not connected to the fuel tank,for not sending the water back in. If you did not start the car since water went into fuel,means that you finished with the above,by connecting everything and put fuel in the tank and start the engine. If you did have the engine running when water went into fuel,means that you have to remove the spark plugs and whilst are out and the fuel tank is clean with new fuel and fuel filter make the engine spinning second to second for 2-3 minutes so as the any old fuel to push out from the spark plug holes. After clean your spark plugs or renew them and also before running the engine is good to put an injection cleaner additive in the fuel tank. Better to put fuel up to a quarter of the tank and run it treating all the system.

Ford F-350 Super... | Answered on Apr 03, 2014


My initial thought is Aluminum can be welded. Depends on cracks relationship to mounting bolts. Check and see if Bell housing is separate from transmission. May be able to swap bell housings and keep transmission.

You may want a good Salvage yard site like Carparts.com. They have a Nationwide link to many Salvagers. One request and you could get 300 responses.

Ford F-350 Super... | Answered on Mar 29, 2014


Something seriously loose or worn:

- steering box mounts
- steering column universal joint or end clamp
- steering box inner ball joints
- tie rod ends
- outer ball joints
- wheel centre hub nut
- wheel stud nuts

A simple test is to jack up both front wheels and place the vehicle on axle stands. Then have someone hold the steering wheel, grab a front wheel at the 9-and-3 o'clock position, and shake it hard in and out. If you can feel slack or looseness, or the person holding the steering wheel can, you have a dangerous fault which should be fixed ASAP.

Ford F-350 Super... | Answered on Mar 26, 2014

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