TB48 Condenser Fan Hack for high-speed.
- vanhack
- Senior Member
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- Full Name: Siddharth Patel
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TB48 Condenser Fan Hack for high-speed.
As temperatures are rising worldwide, or hot periods becoming longer months per annum and hours per day, the cooling systems are not coping with these new temps.
My 4.8, which probably had it's design in 2003, or before has issues cooling the cabin when not moving in traffic, as there is not enough airflow over the condensor when fans are at low speed in the summer months here. We will have 40+C everyday for the next 4 months, just recieved a temperature warning from the fire department that it will be 47 to 50 for the next 4 days. I have instaled a winch, and front light bar with slim LED light, but on a stock bumper, which might also hamper air flow.
Anyhow from the diagram from the workshop manual below on what conditions will switch on the condensor fans to low, and to high speeds, I took the vehicle's coolant temp to 100C, and the fans switched to high speed, and this cooled the cabin.
Having the fans on high speed definitely makes a considerable difference in AC cooling, so I want to hack into the high speed relay, I think relay number 3, and have my own switch to use from the cabin. I am concerned that If I use a 12V battery signal, to the relay's input, that I might be putting too much voltage into that wire, and backfeed 12V to the ECM? Can you confirm whether I am right not to do this, or the ECM send a 12V signal anyhow?
My 4.8, which probably had it's design in 2003, or before has issues cooling the cabin when not moving in traffic, as there is not enough airflow over the condensor when fans are at low speed in the summer months here. We will have 40+C everyday for the next 4 months, just recieved a temperature warning from the fire department that it will be 47 to 50 for the next 4 days. I have instaled a winch, and front light bar with slim LED light, but on a stock bumper, which might also hamper air flow.
Anyhow from the diagram from the workshop manual below on what conditions will switch on the condensor fans to low, and to high speeds, I took the vehicle's coolant temp to 100C, and the fans switched to high speed, and this cooled the cabin.
Having the fans on high speed definitely makes a considerable difference in AC cooling, so I want to hack into the high speed relay, I think relay number 3, and have my own switch to use from the cabin. I am concerned that If I use a 12V battery signal, to the relay's input, that I might be putting too much voltage into that wire, and backfeed 12V to the ECM? Can you confirm whether I am right not to do this, or the ECM send a 12V signal anyhow?
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- cooling_fan_relay1.jpg (94.25 KiB) Viewed 7044 times
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- cooling_Fan_condition1.jpg (92.52 KiB) Viewed 7044 times
Y61 LWB Patrol TB48E, Auto
Distributor for www.quickpitchgcc.com in Middle East & India
Distributor for www.quickpitchgcc.com in Middle East & India
- Peter Connan
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Re: TB48 Condenser Fan Hack for high-speed.
I am not really too clever with this, but I don't think you can put too much power into the relay.
However, it may be safer to just install an additional relay directly to the fan?
However, it may be safer to just install an additional relay directly to the fan?
Mag ons ons kenniskry met lekkerkry aanhoukry.
- hugejp
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Re: TB48 Condenser Fan Hack for high-speed.
Interesting!
I will be watching this one.
I will be watching this one.
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You CAN with a NISSAN!
Jy KAN met 'n DATSUN!
You CAN with a NISSAN!
Jy KAN met 'n DATSUN!
-
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Re: TB48 Condenser Fan Hack for high-speed.
Soooooo, are you still watching JP?
When nature calls
Jacques Steyn
2008 Nissan Patrol 4.8 GRX A/T (190kw)
Tough Dog Suspension | Outback Extreme Rear Replacement Bumper | Ironman Front Bumper
Air Helpers | Snorkel | Frontrunner Roofrack
Wishlist: TPM, Seat covers, drawer system
Jacques Steyn
2008 Nissan Patrol 4.8 GRX A/T (190kw)
Tough Dog Suspension | Outback Extreme Rear Replacement Bumper | Ironman Front Bumper
Air Helpers | Snorkel | Frontrunner Roofrack
Wishlist: TPM, Seat covers, drawer system
- hugejp
- Patrolman 1000+
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2004 4.8 GRX TURBO "Tinkerbell"
2003 TD42T GRX "The Coal Roller" - Home Language: Half & Half
- Has thanked: 211 times
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Re: TB48 Condenser Fan Hack for high-speed.
Just added a direct 12v to fan toggle switch on the dash... if it is hot & I'm crawling in traffic it gets flipped, seems to help a bit.
----------------------------------------------------------------------
You CAN with a NISSAN!
Jy KAN met 'n DATSUN!
You CAN with a NISSAN!
Jy KAN met 'n DATSUN!
- vanhack
- Senior Member
- Posts: 140
- Joined: 01 Oct 2014 06:58
- Full Name: Siddharth Patel
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- Has thanked: 36 times
- Been thanked: 23 times
Re: TB48 Condenser Fan Hack for high-speed.
Super, so 12V direct to which wire on the fans wiring?
Y61 LWB Patrol TB48E, Auto
Distributor for www.quickpitchgcc.com in Middle East & India
Distributor for www.quickpitchgcc.com in Middle East & India
- hugejp
- Patrolman 1000+
- Posts: 2052
- Joined: 21 Oct 2014 21:01
- Full Name: JP Viviers
- Nickname: Oupoot
- Home Town: JHB
- Current 4x4: THE PATROL COLLECTION
2004 4.8 GRX TURBO "Tinkerbell"
2003 TD42T GRX "The Coal Roller" - Home Language: Half & Half
- Has thanked: 211 times
- Been thanked: 217 times
Re: TB48 Condenser Fan Hack for high-speed.
Used the passenger side fan, just ran a wire direct to battery with a switch on the dash. Will see if I can load some pics later.
----------------------------------------------------------------------
You CAN with a NISSAN!
Jy KAN met 'n DATSUN!
You CAN with a NISSAN!
Jy KAN met 'n DATSUN!
- ricster
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Re: TB48 Condenser Fan Hack for high-speed.
JP... I hope you fused that power feed !!!
Regards
Cedric
Nissan Patrol GL 4.2 Diesel Turbo (Iron Maiden)
Nissan SANI 3.0 V6 4x4 (SOLD)
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Cedric
Nissan Patrol GL 4.2 Diesel Turbo (Iron Maiden)
Nissan SANI 3.0 V6 4x4 (SOLD)
Isuzu KB 280 DT 2x4 ('ol Smokey) - SOLD
Suzuki TL 1000R "V twin" (Growler) - SOLD
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