Maxfab4x4 ac fan kit

[CruiserDave]

Just finished installing the ac condenser fan kit from maxfab4x4. Easy install and works perfectly. 98 degrees today and to test it I let the vehicle heat soak and idle for around 30 minutes. Fan kicked on and kept ac cool the whole time. I'll see how it does in traffic on the way to and from work this week. So far im happy with the product.

 

[jeremy j]

Looks like a nice kit. What is triggering the fan to kick on?

I think this would be perfect for my truck. It is ice ice cold when moving but gets pretty warm when I'm idling.

 

[Mrtwooooo]

Looks like a nice kit. What is triggering the fan to kick on?

I think this would be perfect for my truck. It is ice ice cold when moving but gets pretty warm when I'm idling.

Recently installed this kit also. (Since everyone else who made them doesn’t respond anymore)

To trigger it he includes pins to insert into the unused ports on the pressure switch that is located behind the driver side headlight. When the pressure in the system gets to a certain point the fan automatically turns on.

 

[OffRoadScott]

Recently installed this kit also. (Since everyone else who made them doesn’t respond anymore)

To trigger it he includes pins to insert into the unused ports on the pressure switch that is located behind the driver side headlight. When the pressure in the system gets to a certain point the fan automatically turns on.

I really like that idea of using the pressure switch. Mine is manual and turned on with a dash mounted switch, usually only have it on while driving on surface streets as there is air going through it on the highway (hot air but still air).

 

[jeremy j]

Recently installed this kit also. (Since everyone else who made them doesn’t respond anymore)

To trigger it he includes pins to insert into the unused ports on the pressure switch that is located behind the driver side headlight. When the pressure in the system gets to a certain point the fan automatically turns on.

Thanks a lot for the explanation. It's weird I couldn't find that in the description. That is pretty great. I was planning on installing one with just a switch but hadn't because that seems like a pin in the ass.

 

[landtank]

that trigger has been used before. In high heat on an asphalt parking lot the fan might never shut off and kill the battery. that circuit need to include a timer.

 

[jeremy j]

that trigger has been used before. In high heat on an asphalt parking lot the fan might never shut off and kill the battery. that circuit need to include a timer.

I assumed it would be powered by a switched relay so that couldn't happen.

Edit: I've read more about how people use battery power to the relay to allow cool down after you shut the truck off. I don't think I'd care to do that. I'd rather just have the fan run as needed when the ignition is on.

Edit to the edit: On second thought, I could just run it off my house battery to get the cool down and if it ran too long, it just drains the house battery.

 

[ChargedSHOTaco]

Or you can use the Toyota OEM condenser fan that fits perfectly and add a relay controlled by the existing pressure switch.

S

Thread 'ABC's of 80's Cooling Part III - Press Switch'

Jul 28, 2006

Part III - Pressure Switch Activation of Aux Fan for better A/C Condenser Cooling.

In Part II, you will find the relay trigger options for wiring the pusher Aux fan for maximizing A/C condenser efficiency. In Part III, I will detail the procedure for wiring the Aux Fan to come on using the A/C Condenser Pressure switch. Luckily for the Toyota purists this uses only 10 dollars worth of Toyota Parts.

By now, you should have the Aux pusher Fan mounted in front of the A/C condenser, a relay mounted, and your Battery Feed (with appropriate Fan Fuse please!) to pin 30, and the Fan...

• SUMOTOY
• Replies: 142
• Forum: 80-Series Tech

• 

 

[landtank]

Or you can use the Toyota OEM condenser fan that fits perfectly and add a relay controlled by the existing pressure switch.

S

Thread 'ABC's of 80's Cooling Part III - Press Switch'

Jul 28, 2006

Part III - Pressure Switch Activation of Aux Fan for better A/C Condenser Cooling.

In Part II, you will find the relay trigger options for wiring the pusher Aux fan for maximizing A/C condenser efficiency. In Part III, I will detail the procedure for wiring the Aux Fan to come on using the A/C Condenser Pressure switch. Luckily for the Toyota purists this uses only 10 dollars worth of Toyota Parts.

By now, you should have the Aux pusher Fan mounted in front of the A/C condenser, a relay mounted, and your Battery Feed (with appropriate Fan Fuse please!) to pin 30, and the Fan...

• SUMOTOY
• Replies: 142
• Forum: 80-Series Tech

• 

Yup, this is the wiring setup that causes a dead battery.

 

[ChargedSHOTaco]

Yup, this is the wiring setup that causes a dead battery.

I haven’t had a problem with mine, and it’s been over 5 years.

 

[landtank]

I haven’t had a problem with mine, and it’s been over 5 years.

Meaningless. Just means the conditions to create the problem hasn’t happened for whatever reason.

 

[ChargedSHOTaco]

Meaningless. Just means the conditions to create the problem hasn’t happened for whatever reason.

lol.

 

[NeverFinis]

If draining a battery is a concern, one can use a relay with a 12V switched (or keyed) power source along with the ground of the A/C Medium Pressure Switch.

Ground switched control of Aux Fan:
30: GND from Aux Fan
87: Medium AC Pressure Switch GND

86: 12V switched (or keyed) power source.
85: Medium AC Pressure Switch GND

This is how I wired my Toyota Aux AC fan. I use the original aux fan relay location in the relay box on the driver's fender.

 

[Mrtwooooo]

In this specific kit the relay comes with all co the wires connected to it already. He supplies a fuse tap to connect in with the cig lighter fuse inside the fuse box by the driver door. That way the relay is only getting power when the key is on.

 

[CruiserDave]

Like stated above, fuse tap with key switched power. I chose a different fuse than the cig lighter since I've repositioned my obd2 port to point downwards. This allows the ultraguage to be plugged in without any interference with the fuse box cover. Working great so far.