I believe at least one of the ones by the alternator is for ac which it doesn’t look like you have.

 

Yeah, by the wiper motor looks like maybe the connector for the freon pressure sensor where the vac lines should be. The top connector in the second picture looks like it should go to the AC compressor clutch. The fourth picture looks like the air intake temperature sensor, but someone put on a "cold air intake" which doesn't have a hole for the sensor.

Are you saying the temperature gauge gets hotter than you expect? Does the radiator fan come on? The coolant switch that controls the radiator fan is in series with the freon switch, so if someone pulled the AC lines out with the switch, then they should have jumped the 2 terminals of that connector to allow the coolant switch to still be able to turn the radiator fan on. A wiring diagram helps here to understand how the fans are wired.

 

That may of been me that put that "cold" air intake in. The MAF sensor for the air intake is plugged into the piping for the air intake, not sure if the plug in the picture was also in the stock intake, could check on the stock intake if there looks like somewhere a plug would go. The temperature gauge usually gets up to just under halfway after driving for atleast 10 minutes, dont think it usually gets any higher. I am not sure if the radiator fans comes on, but I feel like it doesnt. I tried to test the other day by driving for about 15 minutes till the temperature gauge was about halfway then checked the fan while the car was still running and it wasnt on. I also tried putting the AC on full blast. I am not sure however how hot it actually has to get before the fan comes on.

 

My engine bay (1.6 with ac) does seem to get quite warm even with the ac off, the bonnet will steam water off if I’m idling in the rain, but the temp gauge is just under halfway so I can’t think anything is wrong. Is that what you think the problem is your engine bay getting quite warm?

 

Im not sure if the radiator fan actually works or not, but the temperature gauge usually stays below half way im pretty sure. Inside the car is always hot even with ac on which doesnt blow that cold and only blows even slightly cold when pulling fresh air, when recurcilating it is always warm air. After driving for 10s of minutes the engine bay gets quite hot. Thrashed the car around the beach a bit last weekend and the bonnet was boiling and the engine was absolutely steaming, which is understandable lol considering im hitting 5 thousand revs trying to get out of the sand.

 

Well mine with two working radiator fans, the bonnet still gets quite warm, and temp gauge never goes over halfway, and you said your temp gauge doesn’t go over half, so I don’t think you have a problem with it getting too hot.

 

If you unplug the coolant switch near the thermostat housing while the key is on the radiator fan should come on. The coolant switch is normally closed and it becomes an open circuit above a certain temperature, so this is why unplugging it should cause the fan to come on. The coolant switch has a single wire connector.

 

The last picture...do you have a manual transmission? It looks like it could be the wire for the reverse lights. Do they come on in reverse? But that connector looks like it's plugged to another connector. I can't see where it goes behind the intake air filter.

 

It is a manual. I will have to check later if the reverse lights come on.

 

Our radiator fans are actually really quiet. For the longest time I was convinced my fan didn't work.
And then I happened to be troubleshooting an issue with the engine running and glanced down to see the fan spinning. Never heard it kick on at all. I do have a mega exhaust leak and my thermostat was stuck open for a while though.
However, if DrZ is correct, your fan may not work if the pins are not jumped.

In regards to your unplugged connector question, you are lucky I happened to drive my Corolla to work today, so I will take some pictures before I roll out.
What motor do you have?

 

Well, maybe I can't be of as much help as I thought. With your car being a 96, you have OBD2, so these could be for functions my OBD1 95.5 doesn't have.

I can take alternate angle photos on request when I get home, but at this stage I think you need to find wiring diagrams.

 

Well, maybe I can't be of as much help as I thought. With your car being a 96, you have OBD2, so these could be for functions my OBD1 95.5 doesn't have.

Not a US-market car so the '96 OBD changeover doesn't apply. OBDII wasn't mandated in Aus/NZ until the mid 2000s (some overseas-sourced models got it a little earlier, or Toyota's proprietary protocol)

 

Full metal radiator too.