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Ef fairmont thermo fans just stay on low car is red hott!!! 

 

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 Post subject: Ef fairmont thermo fans just stay on low car is red hott!!!
Posted: Mon Feb 18, 2013 8:03 pm 
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Ef fairmont wagon the fans are just running on low we tryed puting the ac on and DIDNT change how can I make it so when I turn the car on they will just come on hi ?
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 Post subject: Re: Ef fairmont thermo fans just stay on low car is red hott!!!
Posted: Mon Feb 18, 2013 8:24 pm 
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My EL thermos come on high when the ac comes on...

You tested the four thermo relays for the fans? one or two may not be operating?

Next thing to test will be that the computer is sending out the signals to bring the relays on...

Cheers,
Tim

 

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 Post subject: Re: Ef fairmont thermo fans just stay on low car is red hott!!!
Posted: Mon Feb 18, 2013 8:38 pm 
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Where about are the fan relays ?

As well I just want to mod them so theory are always on hi
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 Post subject: Re: Ef fairmont thermo fans just stay on low car is red hott!!!
Posted: Mon Feb 18, 2013 8:40 pm 
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Between the Airbox and the L/H Headlight.
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 Post subject: Re: Ef fairmont thermo fans just stay on low car is red hott!!!
Posted: Mon Feb 18, 2013 8:48 pm 
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Always on high is going to kill your alternator... You will notice voltage drop throughout the car and will suffer some engine performance loss...

Band-aids are never an ideal fix...

Cheers,
Tim

 

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93 Red ED 5spd Manual Build Thread

Performance: Complete AUII VCT Wiring & Power Train, Pacey Headers, 2.5" Exhaust, Exedy Clutch, DBA Rotors
Visuals: FG XR Wheel, XR Front, 17's, BA 5 Spd Shifter, BA Ghia Window Switches, NL Cluster
Tunes: 8" Pioneer Sub, JBL Speakers, Clarion Double DIN Headunit

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 Post subject: Re: Ef fairmont thermo fans just stay on low car is red hott!!!
Posted: Mon Feb 18, 2013 9:23 pm 
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Yer ok that well I have twin battery system cos of my sound system and a bigger alternator so I'm not really worried about that ahahah I have 4 12" subs
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 Post subject: Re: Ef fairmont thermo fans just stay on low car is red hott!!!
Posted: Mon Feb 18, 2013 9:32 pm 
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At speed you need no thermo fans... There is enough airflow to keep the car cool normally (except probably mid summer)... Batteries are no good if you can't produce the amps to keep the charge in them...

It'll work... Just an extra 40 amps or more of load on everything is a complete waste...

Why don't you run diagnostics on the computer? It checks both fan motors and all relays...

Cheers,
Tim

 

_________________

93 Red ED 5spd Manual Build Thread

Performance: Complete AUII VCT Wiring & Power Train, Pacey Headers, 2.5" Exhaust, Exedy Clutch, DBA Rotors
Visuals: FG XR Wheel, XR Front, 17's, BA 5 Spd Shifter, BA Ghia Window Switches, NL Cluster
Tunes: 8" Pioneer Sub, JBL Speakers, Clarion Double DIN Headunit

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 Post subject: Re: Ef fairmont thermo fans just stay on low car is red hott!!!
Posted: Mon Feb 18, 2013 9:47 pm 
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TimmyA wrote:
At speed you need no thermo fans... There is enough airflow to keep the car cool normally (except probably mid summer)... Batteries are no good if you can't produce the amps to keep the charge in them...

It'll work... Just an extra 40 amps or more of load on everything is a complete waste...

Why don't you run diagnostics on the computer? It checks both fan motors and all relays...

Cheers,
Tim


What's the rating on the EL alternator? 75amps isn't really enough to run thermos and the rest of the car lol.

 

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 Post subject: Re: Ef fairmont thermo fans just stay on low car is red hott!!!
Posted: Mon Feb 18, 2013 9:52 pm 
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They're 100 on EL... Thinking EF may be same... But old mate reckons he has a big one for his doof doof...

40amps on wire continuously causes heat, heat causes resistance increase... A joint of plug or connection has more resistance... It gets hotter... Soon something ends up melted or a car on fire...

If he wants to run the fans flat out continuously due to it being too hard to fix the multi speed system he wants one 8awg wire out of the battery, through a 5ag fuse or breaker + a big relay or contactor and into each fan... Big wire, low impedance, less heat, fewer connection points, less chance of setting something alight...

The factory wiring is installed with an intended duty cycle... Not all the time... Maybe 50% EF/EL wiring is undersized in many ways IMHO...

Cheers,
Tim

 

_________________

93 Red ED 5spd Manual Build Thread

Performance: Complete AUII VCT Wiring & Power Train, Pacey Headers, 2.5" Exhaust, Exedy Clutch, DBA Rotors
Visuals: FG XR Wheel, XR Front, 17's, BA 5 Spd Shifter, BA Ghia Window Switches, NL Cluster
Tunes: 8" Pioneer Sub, JBL Speakers, Clarion Double DIN Headunit

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 Post subject: Re: Ef fairmont thermo fans just stay on low car is red hott!!!
Posted: Mon Feb 18, 2013 9:57 pm 
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Ride: ford falcon au3 xr8

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NSW, Australia

el 100 amp and ef 110 amp...
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 Post subject: Re: Ef fairmont thermo fans just stay on low car is red hott!!!
Posted: Tue Feb 19, 2013 1:14 am 
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I have a au motor and I think it's a 130amp ? I think
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 Post subject: Re: Ef fairmont thermo fans just stay on low car is red hott!!!
Posted: Tue Feb 19, 2013 8:44 am 
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std au is 110, well mine is anyway..
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