Member Since: 18 May 2012
Location: Somerset
Posts: 166
Ok so the switch took until last weekend to arrive so I went out today and tried to wire it in...……….. no joy
I took a 12v live from the battery to one side of the switch and when I press it the other side is live - result
when I connect it to the FBH nothing happens, I have a WBUS-5 GPS so my pin 4 is green and says input in (button and temp sensor) if I connect to this it doesn't fire the heater, how long do you have to hold the switch for (didn't want to hold it long incase I damage something?)
Anyone know where I connect the 12v live to
Cheers
11th Jan 2019 1:47 pm
zinke
Member Since: 22 Feb 2014
Location: Scunthorpe
Posts: 584
Without being able to check because I’m not at home at the moment, but I think on the WBUS-5 you connect to ground not to positive like on the WBUS-4.
Pete.IID, webasto software and workshop facility's available.
11th Jan 2019 2:03 pm
Morepower
Member Since: 18 May 2012
Location: Somerset
Posts: 166
Ok but which wire do I ground, is it still the green one on pin 4?
Cheers
Graham
11th Jan 2019 2:21 pm
zinke
Member Since: 22 Feb 2014
Location: Scunthorpe
Posts: 584
Without looking at the manual I can’t say. It will be the same wire, like I think I said before you need to look in the manual and will tell you which wire and if positive or earth is needed for your model of controller
Pete.IID, webasto software and workshop facility's available.
11th Jan 2019 2:26 pm
Morepower
Member Since: 18 May 2012
Location: Somerset
Posts: 166
Member Since: 18 May 2012
Location: Somerset
Posts: 166
11th Jan 2019 2:52 pm
zinke
Member Since: 22 Feb 2014
Location: Scunthorpe
Posts: 584
Looks like you connect the green wire to ground to make it work. Test it by connecting it to the earth connection of the battery. Only needs connecting for a second to trigger the heater (assuming it’s set for a none latching switch).
Pete.IID, webasto software and workshop facility's available.
11th Jan 2019 7:17 pm
Morepower
Member Since: 18 May 2012
Location: Somerset
Posts: 166
Thanks Pete, I’ll pop out this afternoon and try again 👍🏻
12th Jan 2019 9:05 am
Yabba
Member Since: 23 Aug 2016
Location: Laakdal
Posts: 15
I just hope you didn't fry the W-bus, by supplying 12v to a ground...
12th Jan 2019 10:09 am
Morepower
Member Since: 18 May 2012
Location: Somerset
Posts: 166
It lives I fitted the switch and wired it as per Pete’s instructions and it works
Thanks for you help (and patience) Pete
13th Jan 2019 7:57 am
Dan1720v
Member Since: 28 Mar 2018
Location: Street/Somerset
Posts: 176
Morepower wrote:
Thanks guys, I’ll need to see who is running on what network, my phone is on 3 which seems to be the best signal here, but no good for the FBH
I’m on EE and managed decent reception outside your place.
13th Jan 2019 8:25 am
Morepower
Member Since: 18 May 2012
Location: Somerset
Posts: 166
I’ve tried them all Dan and 3 is the most reliable here. Most mobiles only work if I sit in the bedroom window 😱
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so I went out today and tried to wire it in...……….. no joy 
I fitted the switch and wired it as per Pete’s instructions and it works 
