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The problem on a 2007 F150 from Texas(in OHIO now), and what it looked like after the fix. This doesn't look like somebody missed something reassembling. Looks like it's just Ford oversight.
Got towed in, I replace a fuse, seemed fine until we looked harder.
Had a "bank 2 lean" code that went away on it's own after this fix too.
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:shrug: 20 year old car problems, my 06 caravan has been through 2 fuel pumps, 2 radiators, 2 power door locks, etc lol. Somehow the fuel tank handle chewed through the wiring harness back there so I had to wire in a new connector while doing the fuel pump this last time around. Just a side effect of having a vehicle so long, shit breaks.
The wires were resting on a sharp edge of something that vibrates. Like a Cadillac I had to do similar on because somebody did work and didn't refasten the stud mount zipties. Those wires rubbed through on a break line, and that's not even sharp. The difference here is, it looks like ford didn't mount the wires away from that edge.
This your first time working on a ford?
Not at all.
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Here's a lighting control module in a 2003 Grand Marquis.
Those bodge relays activate with ignition power. Apparently the cheapest replacement module was about $240 at the time.
Running lights, head lights, and interior (gauge) lights. Couldn't do just 1 relay, because that would merge 3 separately fused circuits... fire hazard avoidance.