The PCM is located above the steering box, under the battery. I doubt that is your problem. The rear pump only runs to transfer fuel to the front tank, it does not run all the time. The PCM reads both fuel level sensors, then transfers fuel to the front tank as needed. The PCM also uses both level sensor readings to provide an average for the fuel gauge. You need to monitor the data list and see what the front and rear sensors are telling the PCM. My bet is one or both are giving a false reading, such as saying the front tank is full or the rear tank is empty. Fuel level sensors are failure prone. BTW, there is no frame mounted module on an '03, that was on '90s models.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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