2002 WJ fan not turning on
Hey guys. My cousins WJ 4.0l has been intermittently overheating lately. Only at idle. We narrowed it down to the fan not turning on. It only has the e fan. I replaced the fan relay as that seems to be the most common problem but it didn't fix it. Then I tested the fan by hooking it straight to the battery and it kicked on full speed so it's not the fan. I also tested the connectors and everything is fine.
My question is whether the coolant temp sensor could be the problem. I assume that's what the computer reads to know to turn the fan on. I just can't think of anything else it should be.
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