Need to know witch relay is the fuel pump relay there are 4 relays in the main box and another box next to it with 2 relays in it also it is a dual tank truck
SOURCE: 2003 F350 Intrument Cluster
If everything keeps going like that then it sounds like its a problem with the onboard computer. The computer controls all the guages and would explain why they all fail at the same time.
SOURCE: 94 f350 diesel pickup dual
I'd look for a bad or broken ground somewhere, either feeding both tanks, or the gauge itself, but start at the sending units and see if there is a common ground wire coming forward & joining into one.
SOURCE: 1988 ford f150 fuel pump relay location
inner driver side fender well along with the eec relay
SOURCE: where is the fuel pump relay located on 96 ford
In the under hood fuse panel. it is the one beside fuses 15 and 16
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