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I suppose that would work

When it is time for the efan to come on, there should be current to the 85 or 86 pin on the fan relay. If there is no current there, the switch inside the ECM is toast

Then I would suggest your ECM is not turning it on. It is a fairly common problem. It will have to be replaced

First off, a fan shroud on the mechanical fan will increase its efficiency by quite a bit. I am guessing since it is not that good of a shroud, but say in the 30% range. The next thing to do is see...

So, it is running hot but the efan doesn't come on? Something is not right here I think or I just don't understand what the problem is

How is your fan clutch. You don't mention changing it. Fan shrouds? efan coming on?

Actually, we have different methods. His method, and I think this the thread for it, involves using the factory relay and choosing the correct wire. Mine, is to use a separate relay in which the...

After thinking about this some more, your efan is controlled by the relay which is controlled by the PCM. So, if you wire one of these in, it needs to be done in a way that the PCM does not see it...

The best way is to use the switch to run a relay for the fan

I have tried water wetter and found it works well when the system is doing what it is supposed to. But if it is going to overheat, it won't stop it

If the top hose is soft, the question is if your radiator cap holds pressure. A soft hose doesn't really tell you anything accept it is soft, which can be relative since you are only dealing with...

It is easy enough to wire a switch into the exciter wire for the fan relay.

Check your fan relay and your mechanical fan clutch

Awesome price for that

The Renix era fan would come on with radiator temps. Later it was computerized.

Standard rotation is clockwise, reverse is counterclockwise

You will need to figure out if you have standard or reverse rotation on your fan pulley. I don't think you do. That applies to water pumps, which is where the ZJ fan is mounted, not like the XJ...

I will change it to all caps so everyone will hear :D

Sounds like it is time to replace the clutch. If you do replace the radiator, you can do so without disturbing your refrigerant. It should slip right out.

No, I mean make sure your cooling system is up for the heat. In your triple digit temps there you will be putting 130° on the radiator which will cause issues with a system that is marginal. Also,...

IIRC you are getting real cool AC, which means you are getting a hot condenser putting hot air on the radiator. Might need to give it some attention.

I hate drunk drivers. Glad you are OK. You gonna buy back the rig for that fresh motor?

Sounds like you have it figured out.

All I can say is, no wonder the 4.0 runs hot

No one will admit it, but it really is poorly designed