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Old 13-11-2008, 09:29 PM   #1
vermiltina
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Default Coolant temp sensor???

hey all, i am putting an AU engine in my ea and am going to fit the AU thermostat housing but see the problem is that the ea-ef have a temp sensor and a coolant temp sensor in the housing, where the AU one has nothing.
i know there is the sonsor at the back of the head but thats just for the gauge is it not?
see the ea-ef have one for just the gauge(that has one wire) and one that goes back to the ecu(has 2 wires).

so where is the coolant temp sensor on the AU?
any help would be great..
cheers
shaun

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Old 13-11-2008, 09:38 PM   #2
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Default

Quote:
Originally Posted by vermiltina
hey all, i am putting an AU engine in my ea and am going to fit the AU thermostat housing but see the problem is that the ea-ef have a temp sensor and a coolant temp sensor in the housing, where the AU one has nothing.
i know there is the sonsor at the back of the head but thats just for the gauge is it not?
see the ea-ef have one for just the gauge(that has one wire) and one that goes back to the ecu(has 2 wires).

so where is the coolant temp sensor on the AU?
any help would be great..
cheers
shaun
Coolant temp sensor for the AU is in the header tank, the egg crate looking thing.
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Old 13-11-2008, 10:33 PM   #3
vermiltina
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Default

cheers for that
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Old 14-11-2008, 12:09 AM   #4
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Default

Quote:
Originally Posted by vermiltina
cheers for that
Not all AU header tanks have the sensor. My AU1 does, my AU2 does not.

Just be sure to check.

GK
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Old 14-11-2008, 12:30 AM   #5
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I thought the sensor in the header tank was for coolant level not temperature!!!!
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Old 14-11-2008, 01:37 AM   #6
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Quote:
Originally Posted by peterban
I thought the sensor in the header tank was for coolant level not temperature!!!!

spot on

that sensor is just water level on the up series models, such as fairmonts and XRs

the sensor at the back of the head is the head temperature sensor, which is teh ecu sensors, the ecu generates a signal for the gauge. gauge doesn work = thermos dont work = overheating

what wiring loom and ecu are you going to use? more so what dash are u using. id just fit and ef thermostat housing and fit and ea dash sensor, and the rest use the au loom.
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Old 14-11-2008, 09:04 AM   #7
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Quote:
Originally Posted by EvilChief
spot on

that sensor is just water level on the up series models, such as fairmonts and XRs

the sensor at the back of the head is the head temperature sensor, which is teh ecu sensors, the ecu generates a signal for the gauge. gauge doesn work = thermos dont work = overheating

what wiring loom and ecu are you going to use? more so what dash are u using. id just fit and ef thermostat housing and fit and ea dash sensor, and the rest use the au loom.
thats what i am thinking of doing cause i am using my ea dash which has one sensor for the gauge and one for the ecu, so yeah i think i might just use the ef/el one to make it easier....
it was just that the AU looks allot neater without the sensors in it..:(
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Old 14-11-2008, 09:30 AM   #8
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Default

I'll correct my earlier post, as I didn't properly read the question. Serves me right! LOL!

The coolant level sensor was on the S1 header tank/coolant tank/reservoir. The other guys are correct in saying the coolant temp sensor is behind the engine at the firewall.

Cheers,

GK
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Old 03-08-2011, 11:37 AM   #9
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Default Re: Coolant temp sensor???

what about BA
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Old 04-08-2011, 11:01 AM   #10
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Default Re: Coolant temp sensor???

anyone knows where is coolent sensor
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Old 04-08-2011, 11:57 AM   #11
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Default Re: Coolant temp sensor???

hi motojazz
this is the AU section and a 3 year old thread at that.
you'll have better luck posting in the BA section in your very own new thread!
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Old 12-08-2011, 12:42 AM   #12
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Default Re: Coolant temp sensor???

B-series is in a similar position .. as the head is a bit bigger ... the sensor is tucked around a bit further.
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Old 13-12-2011, 04:56 AM   #13
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Default Re: Coolant temp sensor???

I have an AU ser 2 and there is no sencer in the top tank but my warning light is flashing!
Does this mean the sencer at the back of the head is falty?
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Old 15-12-2011, 01:14 AM   #14
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Default Re: Coolant temp sensor???

Maybe. Get a sparky to have a look for you; the AUs do occasionally break those sensors.

*edit* Hang on, which warning light? Temp or coolant level?
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Old 15-12-2011, 01:53 AM   #15
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Default Re: Coolant temp sensor???

Lol its ok I found the problem and here is the fix;
Between the battery and the suspension tower you will find a round plug,
This plug is used on Series 1 AU for the coolant level sensor!
Ford used a loop plug to cancel this but the earth goes bad so it needs to be upgraded!
Find the Yellow with Red stripe wire and make a connection to the Negative on the Battery.

On the series 3 this was deleted!

If you want to a Series 1 bottle with sensor can be connected if you can be bothered ....

(note some one did this on mine but they used a red wire to do this with and it has been since added to the positive by mistake. I have changed this to another color and taped it to the Negative to prevent this mistake happening again
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Old 15-12-2011, 08:28 PM   #16
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Default Re: Coolant temp sensor???

How do I unclip, undo the 2 wires on the sensor. I can hardly reach it behind the head.
Can I short it out to check if fans come on?
My problem is I overheat at lights and steep hills. Both fans come on at start with A/C on. (thanks someone)
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Old 16-12-2011, 01:51 AM   #17
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Default Re: Coolant temp sensor???

Quote:
Originally Posted by John J Gray
How do I unclip, undo the 2 wires on the sensor. I can hardly reach it behind the head.
Can I short it out to check if fans come on?
My problem is I overheat at lights and steep hills. Both fans come on at start with A/C on. (thanks someone)

Sounds like you may have a pump falure.
sometimes the impelor can rust its vains down to blades just like a vegi chopper.
this can happen when water is used in place of coolent!
I have had this happen on a v6 I once had!
Ok when moving but overheats easy for no good reason.

Oh and check your thurmostat it could be stuck , if so replace it!

Last edited by DriveArealCar; 16-12-2011 at 01:56 AM.
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Old 16-12-2011, 02:06 AM   #18
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Default Re: Coolant temp sensor???

Quote:
Originally Posted by vermiltina
hey all, i am putting an AU engine in my ea and am going to fit the AU thermostat housing but see the problem is that the ea-ef have a temp sensor and a coolant temp sensor in the housing, where the AU one has nothing.
i know there is the sonsor at the back of the head but thats just for the gauge is it not?
see the ea-ef have one for just the gauge(that has one wire) and one that goes back to the ecu(has 2 wires).

so where is the coolant temp sensor on the AU?
any help would be great..
cheers
shaun

Ok the sensor in the header tank is a coolent level sensor.
The sensor in the back of the head is the temprator sensor, and the ecm sends the relivant info to the instraments.
So if you need 2 the easy way is to use the ef thermostat housing to add the second sensor
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Old 13-09-2014, 01:33 PM   #19
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Default Re: Coolant temp sensor???

Hi
I have a series 3. Fairmont ghia au but have no sensor in the overflow bottle? Is this normal? My mates series 1 Fairmont ghua has a sensor in the overflow bottle?
Cheers
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Old 13-09-2014, 02:14 PM   #20
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Default Re: Coolant temp sensor???

Hi
I have a series 3. Fairmont ghia au but have no sensor in the overflow bottle? Is this normal? My mates series 1 Fairmont ghua has a sensor in the overflow bottle?
Cheers
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