This was a lamp failure sensor for camry tail light the harness Comedown and pinched when the truck is opened the harness needs to be fixed and the box need replaced find the short in the harness 1st this is a problem and has been for years
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Wel l some things on toyota work on a neg ground light
the fan switch it on it grounds and turns the relay on to turn on the
fan what I do to find problem is hook a test light to the positive cable pull the cable off and put the test light inbetween turn the key on possition and pull fuse oem at a time as you pull the fuse
thw light schould go out if it does not go out that's where your short is get a wiring diagrame and follow the current to the short
except for one fuse for Intergration relay that schould take longer to go out so give that on more time to go off but it schould go out in time give it a few min,
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