HD cooling dual fan question please

[JustSumDad]

Ok, so I have a 2003 that stock HAD an HD cooling fan setup.
That was sometime along the way been removed and a cheap dorman like aftermarket electric only two wire fan has been installed.
I cant tell if there was originally a three wire or original two wire... how was this setup in 2003 HD versions?

Today I found at a wrecker that I can reach with an HD fan setup, but he tells me that it has three wires.

Can I still use this in my rig?

 

[JeepJeepster]

You can certainly use the mechanical fan and shroud (I recommend getting a new clutch).

You could certainly use the three wire fan if you Jeep does have a two wire setup. I would be curious to know how many CFM the single fan pushes compared to the low or high speeds on the two speed fan... I also do not know how many amps the single speed setup is capable of handling as I imagine the high speed on the two speed pulls more amps. What Im saying is, you would probably want to wire the low speed side and see if that would work to keep your Jeep cool. The high speed wire would just never be used. I would watch the temps very closely to make sure the low speed can keep the Jeep cool... It will have the mechanical fan as a backup.

There use to be a member here that said the HD setup had a single speed fan and the non-HD always had a two speed... Ive never seen a stock HD setup in person to know...

I've only ever heard my electric fan kick on high when the transmission was getting hot (over 200F). Otherwise, it is on low if the A/C is on. The mechanical fan is able to keep the engine below 217F, so the fan never kicks on to cool the engine.

 

[CheddarGau]

The 2 wire and 3 wire connectors are different shape and won't fit (i found out the hard way). 2003 has a 2 wire fan.

You can also get an HD clutch for your clutch fan if you are worried about cooling issues. I prefer having the 2 fan set up.

 

[JeepJeepster]

The 2 wire and 3 wire connectors are different shape and won't fit (i found out the hard way). 2003 has a 2 wire fan.

You can also get an HD clutch for your clutch fan if you are worried about cooling issues. I prefer having the 2 fan set up.

His connectors have already been cut off, so that wont be an issue.

 

[JustSumDad]

You can certainly use the mechanical fan and shroud (I recommend getting a new clutch).

You could certainly use the three wire fan if you Jeep does have a two wire setup. I would be curious to know how many CFM the single fan pushes compared to the low or high speeds on the two speed fan... I also do not know how many amps the single speed setup is capable of handling as I imagine the high speed on the two speed pulls more amps. What Im saying is, you would probably want to wire the low speed side and see if that would work to keep your Jeep cool. The high speed wire would just never be used. I would watch the temps very closely to make sure the low speed can keep the Jeep cool... It will have the mechanical fan as a backup.

There use to be a member here that said the HD setup had a single speed fan and the non-HD always had a two speed... Ive never seen a stock HD setup in person to know...

I've only ever heard my electric fan kick on high when the transmission was getting hot (over 200F). Otherwise, it is on low if the A/C is on. The mechanical fan is able to keep the engine below 217F, so the fan never kicks on to cool the engine.

Thank you I will go get it then