Hello, I'm Chris.I will do my best to answer your question fast and accurate using the info you have provided. Thanks for visiting Just Answer.
Its in the IP relay block in the center of the dash.
just pulled center dash apart, still cannot find i/p relay box. found turn flasher (by back of radio). Saw module unit (not sure what this is) on floor on top of center hump. Stuck head under dash, do not see anything looking like relay box
is the relay box behind duct work? -- do i need to remove items to get at it?
i had a senior moment. i kept thinking this was an '01 (what my tech wrote), actually is '02. looking at alldata, relay is part of central junction box & not servicable (according to footnote), any thoughts.
History -- truck could run 5 minutes or 1 hour and just shut off. pressure will drop when acting up. usually starts right back up. replaced fuel pump & filter, listened to pump with stethoscope through tank & when it acts up, does sound like pump just turns off (like switch). this why i was looking for relay.
Thats a good reaon you could not find it. Here is the diagram for the 02 model from Ford shown below.
You need to go ahead and replace the relay in case its overheating, there cheap. The PCM controls your fuel pump relay and it can turn it off. When the fuel pump is not running but it should be, check the power at the inertia switch to see if there is no power getting to the pump.
that is the picture i have too. no relay (that i see) is there for fuel pump. supposely it is
integral with cjb. i did replace pcm relay (from ford -- didnt help). do you have to replace cjb (dont see how it is integral with box)
thanks for confirming that. i was going nuts over this. if im thinking of this right, i should be able to hook up a test light to power source on inertia switch and watch if power goes out?
tuesday evening -- i have ran the truck about 4 times so far (at least 1/2 hour or more) and the truck keeps running. im going nuts. i will keep you posted.
thursday evening -- yesterday had it running for about 30 minutes, finally quit (while
the owner was here), tried starting & no power going to switch. replaced cjb today, ran for about 45 minutes (OK) and then took out for road test, so far, so good. thanks for your help.