Electric fan wiring question

Hello everyone, got a 2002 Z71 Tahoe, clutch fan. Found an electric fan and fuse block in the junk yard, and had them take it out for me.

They split the harness between the fuse block and the fans, but most of the wiring looks pretty straight forward, colors just go back together it looks like.

The little plug with the two wires (light blue and green) coming off the fuse block are there, as is the big red power wire.

Here's what I'm confused on.

-where is the ground wire?? I have 4 wires leaving the fans and 4 color matching wires leaving the fuse block heading for the fans that seem to obviously just go together, but no ground...

Is the ground just supposed to be spliced in the two fan grounds or something?

-secondly, what are these 3 miniature blue wires that come from the fuse block in the photo? I don't really know what these do or if I need them.

Thanks!

I guess you have one ground for both and two plus lines for each of the fans.

Just measure the passage. The positive cable must have continuity to ground, but the positive cable don't have continuity to the other positive cable.

nonickatall said:

I guess you have one ground for both and two plus lines for each of the fans.

Just measure the passage. The positive cable must have continuity to ground, but the positive cable don't have continuity to the other positive cable.

Click to expand...

That's what I was thinking, one of those wires on each fan is a ground, so tap into each ground and ground it to the frame,l as it continues it's way to the fuse block, if I am seeing this correctly.

Here's what the harness should look like all put together.

Found out the wiring for the ground, so apparently only the fan with the black wire goes to the frame for ground, just like in the photo from Fless. The other 3 fan wires go straight towards the fuse block, but the black heads to the frame to ground before carrying on to the fuse block.

So AC turns on passenger fan to high, like it's supposed to.
Operating temp without ac is both fans on low, which works.

But AC with operating temp combined is supposed to be both fans high.

Instead, when it gets to that point, it turns the drivers fan off, and turns the passenger fan on high.
It's like there is no setting for both fans on high. If the passenger kicks to high because of the AC, the driver fan just completely stops.

Any ideas?
Thanks

88lance said:

So AC turns on passenger fan to high, like it's supposed to.
Operating temp without ac is both fans on low, which works.

But AC with operating temp combined is supposed to be both fans high.

Instead, when it gets to that point, it turns the drivers fan off, and turns the passenger fan on high.
It's like there is no setting for both fans on high. If the passenger kicks to high because of the AC, the driver fan just completely stops.

Any ideas?
Thanks

Click to expand...

Figured it out, turns out both blue wires from the fuse block are supposed to tie together. Problem solved, everything works great

88lance said:

Figured it out, turns out both blue wires from the fuse block are supposed to tie together. Problem solved, everything works great

Click to expand...

so where do the 2 grounds connect to? I have one also, but I don't have to 2 ground eyelids, and I don't know where they connect to.

02slpSS said:

so where do the 2 grounds connect to? I have one also, but I don't have to 2 ground eyelids, and I don't know where they connect to.

Click to expand...

There aren't two grounds. Only a single eyelet as @Fless earlier post shows: 4

The OEM grounding is in the right side frame/bumper area. There's a bung for a bolt there even on earlier models.

So I’m a little confused if there not grounds what do they connect to? And this is where I’m starting from I don’t even have the eyelet on my harness