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Strange cooling fan issues

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Old 06-17-2016, 04:00 PM
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Strange cooling fan issues

So to begin the story here's what it is doing..... when I first start the car the dash lights all light up normal the temp and gas gauge both show they have the ability to light up completely then temp gauge goes to zero like normal. Start driving and gauge goes up normally and reaches the middle where it stays and never gets hotter but the fan never comes on and I can feel the engine get tighter and sluggish kinda like it wants to die but only can tell this when at like a red light. If I press the ac button neither of the fans come on.

Now things I have replaced are
All temp sensors (junk yard ones though unknown condition but same exact symptoms with either set)

Fan timer box (from a parts car that ran perfectly but again no guarantee to work any better but same symptoms)

Relay under hood passengers fuse box (definitely good relay )

Tests and things tried....

Jumped both fans to battery and both work perfect

Tested yellow ignition wire at drivers inside fuse box and is hot

Jump both fan temp switches rear one by thermostat powers with key on and front temp sensors kicks on with key off

And I just tested for ground at the fan timer and it seems as though I get nothing from the black wire that is supposed to be g401 g402 and g404

I rechecked every fuse and it's all good

Another odd thing is I can not get the right side fan to kick on while jumping the relay itself
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