Ddays
Hooked
So over the weekend I ran into an overheating issue that ended up cutting my trip to Rausch Creek short. The problem started just as I was turning into the parking lot - my hi-temp light & chime went off. With Cozdude's help & Scull20 lending me some coolant, we found the fan not working and a pinhole in the thermostat housing. I could run for short periods and then would have to stop and let the Jeep cool down. Decided to throw in the towel instead of holding everyone else up and head for home during daylight hours.
Once on the highway the temp would slowly rise when going up long hills and get over the 3/4 mark unless I ran the heater full blast hot. With the heater on like that it was fine. So I took it to the dealership and was diagnosed with a wiring issue. This is annoying and embarrassing as hell, but the fan wire was hooked up backwards. See photo below (Don't laugh at my battery connections - I ordered new terminals today)
Now, it was my fault the wire was hooked up wrong because I just installed my new battery the day before I left. But looking at that photo, who wouldn't hook the damn BLACK wire up to the NEGATIVE battery post? This is the photo AFTER the issue was corrected. The BLACK wire the yellow wire points at goes to the POSITIVE terminal. :thinking: Stupid ass lesson learned and hopefully everyone else pays better attention than I did - maybe you'll remember to double check after reading this.
So after all that I still have a question: Why was the Jeep running hot on the highway at 65-70mph? At those speeds the fan not working shouldn't have been an issue, right? The fan shouldn't even turn on at those speeds I would think. I drove it to work today in stop & go traffic and at sustained 70mph. No issues. Does the fan wiring have a sensor that does something that would cause it to run hot at speed? Or could the pinhole in the thermostat housing have caused the system to run un-pressurized causing the higher temps?
Once on the highway the temp would slowly rise when going up long hills and get over the 3/4 mark unless I ran the heater full blast hot. With the heater on like that it was fine. So I took it to the dealership and was diagnosed with a wiring issue. This is annoying and embarrassing as hell, but the fan wire was hooked up backwards. See photo below (Don't laugh at my battery connections - I ordered new terminals today)
Now, it was my fault the wire was hooked up wrong because I just installed my new battery the day before I left. But looking at that photo, who wouldn't hook the damn BLACK wire up to the NEGATIVE battery post? This is the photo AFTER the issue was corrected. The BLACK wire the yellow wire points at goes to the POSITIVE terminal. :thinking: Stupid ass lesson learned and hopefully everyone else pays better attention than I did - maybe you'll remember to double check after reading this.
So after all that I still have a question: Why was the Jeep running hot on the highway at 65-70mph? At those speeds the fan not working shouldn't have been an issue, right? The fan shouldn't even turn on at those speeds I would think. I drove it to work today in stop & go traffic and at sustained 70mph. No issues. Does the fan wiring have a sensor that does something that would cause it to run hot at speed? Or could the pinhole in the thermostat housing have caused the system to run un-pressurized causing the higher temps?
