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Large MPVs -- Ford Galaxy / VW Sharan / SEAT Alhambra: => Ford Galaxy / VW Sharan / SEAT Alhambra => Topic started by: 2006ransome on January 18, 2017, 08:12:59 PM

Title: Auxillery heater outside sensor
Post by: 2006ransome on January 18, 2017, 08:12:59 PM
Hi all
Re the ambient temp sensor on the very late mk2 did I read there is a difference between earlier models switching and the later ones ? Something like early 10 deg C and later 5 deg C ? Or have I made that up and if not do I have it correct ?
I trailed through with the search and am damned if I can find it and the Haynes manual I have is w*ank
Title: Re: Auxillery heater outside sensor
Post by: gregers on January 18, 2017, 10:01:52 PM
from what i remember,the mk1 came on at 5 degrees and the mk2 around 10 degrees.
is that what your remembering hence the confusion?
Title: Re: Auxillery heater outside sensor
Post by: steveo59 on January 18, 2017, 10:55:51 PM
Hi, it is possible to remove the ambient temperature switch, which is located on the wiper arm mechanism, and run a wire into the cabin to a switch. This allows you to be in control of when you put the auxillay heater on, both to warm the car up or to test when its warmer weather above 10 deg c.
Title: Re: Auxillery heater outside sensor
Post by: Chrispb on January 19, 2017, 09:45:15 AM
Yes a lot of members have already done this, use an illuminated switch in preference to warn you that the power is applied.
Title: Re: Auxillery heater outside sensor
Post by: 2006ransome on January 19, 2017, 11:57:50 AM
from what i remember,the mk1 came on at 5 degrees and the mk2 around 10 degrees.
is that what your remembering hence the confusion?
That will be it

Thank you
Title: Re: Auxillery heater outside sensor
Post by: steveo59 on January 20, 2017, 12:21:59 AM
Hi, even if the switch is not illuminated you will know if its on, if it works you will hear it.
Title: Re: Auxillery heater outside sensor
Post by: Chrispb on January 20, 2017, 11:53:08 AM
Yes you will hear it but one of the biggest problems with these heaters is short run times, stop and start journeys are not good especially runs only lasting a few minutes that don't allow the heater to run at full speed to burn off excess fuel.
If your going to go to the trouble of fitting a switch and then leaving it switched on sort of defeats the object of avoiding an unnecessary start for the heater.
That's just my view on it.
Title: Re: Auxillery heater outside sensor
Post by: Tezerez on January 20, 2017, 01:58:33 PM
Any suggestions on where to run such a wire, please?  Especially getting it through the bulkhead.
Title: Re: Auxillery heater outside sensor
Post by: johnnyroper on January 20, 2017, 02:57:42 PM
I connected my 3 wires up by ecu then ran in to cabin through a grommet on bulkhead passenger side then round to the centre dash area. I traced wires  back to ecu harness and soldered them in but you can just connect to existing temp switch plug.
Depending what switch you use you may need either 2 or 3 wires. Straight switch will be 2 illuminated will be 3 as it needs an earth.
I had existing rocker switch spare so used that but also linked in a small led that I fitted under switch to illuminate when it is on.
Title: Re: Auxillery heater outside sensor
Post by: Tezerez on January 20, 2017, 03:07:45 PM
Thank you :)
Title: Re: Auxillery heater outside sensor
Post by: Kristaps Baltais on January 20, 2017, 06:23:48 PM
Yes you will hear it but one of the biggest problems with these heaters is short run times, stop and start journeys are not good especially runs only lasting a few minutes that don't allow the heater to run at full speed to burn off excess fuel.
If your going to go to the trouble of fitting a switch and then leaving it switched on sort of defeats the object of avoiding an unnecessary start for the heater.
That's just my view on it.

i like this way of thinking
Title: Re: Auxillery heater outside sensor
Post by: steveo59 on January 21, 2017, 11:24:24 PM
Hi, if you have any of the six full size switch spaces balnked off (the ones either side of the radio), you could get a spare switch off ebay. I used another hazard warning switch, and wired this to turn on/off my auxillary heater. This switch can also be wired to illuminate when switched on.
Title: Re: Auxillery heater outside sensor
Post by: 2006ransome on January 22, 2017, 07:35:30 PM
Another question on the same circuit
Where abouts is relay K272 which is mentioned on the auxiliary heater information sheet that I found on this site. Just checking it is under the fuses in the cabin drivers side or is it else where ? Also is  it the same relay through all the mk 1 and 2's
Title: Re: Auxillery heater outside sensor
Post by: Chrispb on January 23, 2017, 01:33:19 AM
Don't think it's used on MK1 it's certainly not on all models of MK2
Below is a pic of my MK2 second layer, if you have one it shares slot 10, two grey colour relays the first one for the horn the second being K272
Title: Re: Auxillery heater outside sensor
Post by: 2006ransome on January 23, 2017, 02:49:44 PM
Don't think it's used on MK1 it's certainly not on all models of MK2
Below is a pic of my MK2 second layer, if you have one it shares slot 10, two grey colour relays the first one for the horn the second being K272
Hi Chris
No picture sorry
Can you try again and thanks for the reply btw
Title: Re: Auxillery heater outside sensor
Post by: Chrispb on January 24, 2017, 10:00:25 AM
Oops would help if i'd attached it[attachimg=1]
Title: Re: Auxillery heater outside sensor
Post by: 2006ransome on January 29, 2017, 07:35:48 PM
Thanks very much for the picture
Title: Re: Auxillery heater outside sensor
Post by: yeshu26 on February 21, 2017, 07:11:51 PM
Are these the only picture in the fusebox on driver side? My relay look totally different. It is a 58 plate sharan.
Title: Re: Auxillery heater outside sensor
Post by: Chrispb on February 22, 2017, 04:48:48 AM
https://www.fordmpv.com/smf2/ford-galaxy-reference-library/galaxy-mk2-tdi-gaining-access-to-central-junction-box-fuses-relays/#sthash.rR312kxE.dpbs
Title: Re: Auxillery heater outside sensor
Post by: yeshu26 on February 22, 2017, 01:39:00 PM
Ok, I have been unsuccessful in taking out the fuse panel, but why my relays look different than yours?
Title: Re: Auxillery heater outside sensor
Post by: yeshu26 on February 22, 2017, 01:57:06 PM
Ok, I have been unsuccessful in taking out the fuse panel, but why my relays look different than yours?
Title: Re: Auxillery heater outside sensor
Post by: Chrispb on February 22, 2017, 05:02:07 PM
Looks the same to me, there are three layers to the fuse box/relays but you may have some relays with different numbers on them.
why do you need to get to the relays?
Title: Re: Auxillery heater outside sensor
Post by: yeshu26 on February 23, 2017, 05:14:43 PM
Hi Chris

1: I want to check the relay of the aux heater, to see if it is triggering or not.

2: For my car is the ambient sensor around the wiper? I found near the Aircon radiator. Does mk2 have two sensors for temperature? Any picture to share the location please.
thanks


" Looks the same to me, there are three layers to the fuse box/relays but you may have some relays with different numbers on them.
why do you need to get to the relays? - See more at: https://www.fordmpv.com/smf2/ford-galaxy/auxillery-heater-outside-sensor/#sthash.IMBK4mjs.qlYGchpJ.dpuf "
Title: Re: Auxillery heater outside sensor
Post by: johnnyroper on February 23, 2017, 05:21:14 PM
Boost heater does not have a relay it is controlled via input from ambient switch and engine ecu.
As per other thread ambient switch on wiper linkage nearside
Title: Re: Auxillery heater outside sensor
Post by: insanitybeard on February 23, 2017, 06:09:48 PM
The location of the temp sensor is covered and a link to a picture of it can be found here (https://www.fordmpv.com/smf2/ford-galaxy/aux-heater-3730/msg22690/#msg22690). The sensor located behind the bumper near the radiator is the ambient air temp sensor used for the climate control panel/ temp readout in the instrument cluster.