Yet another FBH question!

Mike Trident · 28th March 2019, 14:53

I know a little knowledge can be a dangerous thing lol.

Hypothetically speaking, my FBH that I recently fitted to my 75 is the early type
66232C which I understand has better firmware? Anyway, if I purchased one of these:-

https://www.ebay.co.uk/itm/GSM-SWITC...e196%7Ciid%3A1

And wired it to provide +12v to pin 1 on my FBH, then connect pin 4 to my ATC panel somehow, I could turn on my FBH from anywhere via text? With it being a 66232C it would turn on +12v power to pin 4 at 30 Deg to power up the ATC?

Or am I chatting rubbish lol

Eddy600 · 28th March 2019, 18:19

This is the shop you want to be looking at https://www.gsm-uk.net/shop-2

and this the thread with the information https://www.the75andztclub.co.uk/for...d.php?t=231515

Did it to mine and is a worthwhile thing to do!

Mike Trident · 28th March 2019, 19:48

So I wasn't chatting rubbish then lol?

Mine is the earlier type FBH, which apparently will switch on power to the ATC itself at 30 Deg from what I understand.

Eddy600 · 28th March 2019, 21:00

Wouldn't be able to answer that I'm not sure it would automatically turn on the blowers, but with the dual GSM controller it can be set up so it starts the fbh then 5 minutes later the second relay turns on the atc at it's last setting, I leave mine on auto and 20 degrees both side, great coming out to the car and not having to defrost the windscreen.

Devilish · 5th April 2019, 21:26

All PCB's send a 12v signal from pin 4. It is a 12v signal, not a 12v power supply, it should not be used to power A/C or ATC directly, it should be used to switch a relay that carries sufficient current to run the above.

If you are going to install a 2 relay GSM unit that has 5 min delay in the software for relay 2, a DPDT relay will have to be wired into the ATC power supply . For A/C a SPDT relay is used.

28th March 2019, 14:53	#1
Mike Trident Posted a thing or two Rover 75 CDTi Saloon & Citroen C1 Join Date: Jun 2016 Location: Oakenshaw, Near Bradford Posts: 1,622 Thanks: 385 Thanked 552 Times in 328 Posts	Yet another FBH question! I know a little knowledge can be a dangerous thing lol. Hypothetically speaking, my FBH that I recently fitted to my 75 is the early type 66232C which I understand has better firmware? Anyway, if I purchased one of these:- https://www.ebay.co.uk/itm/GSM-SWITC...e196%7Ciid%3A1 And wired it to provide +12v to pin 1 on my FBH, then connect pin 4 to my ATC panel somehow, I could turn on my FBH from anywhere via text? With it being a 66232C it would turn on +12v power to pin 4 at 30 Deg to power up the ATC? Or am I chatting rubbish lol __________________ Rover 75 2.0 CDTi (131Ps) Conn SE Saloon. (Manual) 160 Remap, cruise control, electric window blind, temp gauge, Real walnut / ZT interior, FBH with GSM control. BORN Tuesday, 5th October 2004 @ 12:35:52 This vehicle was the 104,679th 75 to run off the production line, out of 112,381 This vehicle was the 3,318th 75 CDT Connoisseur SE (135) to be made out of 4,744 This vehicle was the 12,440th 75 in Starlight Silver (code: MBB) to be made out of 14,280 Starlight Silver 75s

28th March 2019, 19:48	#3
Mike Trident Posted a thing or two Rover 75 CDTi Saloon & Citroen C1 Join Date: Jun 2016 Location: Oakenshaw, Near Bradford Posts: 1,622 Thanks: 385 Thanked 552 Times in 328 Posts	So I wasn't chatting rubbish then lol? Mine is the earlier type FBH, which apparently will switch on power to the ATC itself at 30 Deg from what I understand. __________________ Rover 75 2.0 CDTi (131Ps) Conn SE Saloon. (Manual) 160 Remap, cruise control, electric window blind, temp gauge, Real walnut / ZT interior, FBH with GSM control. BORN Tuesday, 5th October 2004 @ 12:35:52 This vehicle was the 104,679th 75 to run off the production line, out of 112,381 This vehicle was the 3,318th 75 CDT Connoisseur SE (135) to be made out of 4,744 This vehicle was the 12,440th 75 in Starlight Silver (code: MBB) to be made out of 14,280 Starlight Silver 75s Last edited by Mike Trident; 28th March 2019 at 19:57..

5th April 2019, 21:26	#5
Devilish Been round the block 75 Tourer Join Date: Apr 2009 Location: Cannock Posts: 4,126 Thanks: 3 Thanked 189 Times in 121 Posts	All PCB's send a 12v signal from pin 4. It is a 12v signal, not a 12v power supply, it should not be used to power A/C or ATC directly, it should be used to switch a relay that carries sufficient current to run the above. If you are going to install a 2 relay GSM unit that has 5 min delay in the software for relay 2, a DPDT relay will have to be wired into the ATC power supply . For A/C a SPDT relay is used. __________________ If at first you don't succeed, hide the evidence

28th March 2019, 18:19	#2
Eddy600 Loves to post Rover, MG Join Date: Jul 2016 Location: Halifax Posts: 275 Thanks: 19 Thanked 77 Times in 61 Posts	This is the shop you want to be looking at https://www.gsm-uk.net/shop-2 and this the thread with the information https://www.the75andztclub.co.uk/for...d.php?t=231515 Did it to mine and is a worthwhile thing to do!

28th March 2019, 21:00	#4
Eddy600 Loves to post Rover, MG Join Date: Jul 2016 Location: Halifax Posts: 275 Thanks: 19 Thanked 77 Times in 61 Posts	Wouldn't be able to answer that I'm not sure it would automatically turn on the blowers, but with the dual GSM controller it can be set up so it starts the fbh then 5 minutes later the second relay turns on the atc at it's last setting, I leave mine on auto and 20 degrees both side, great coming out to the car and not having to defrost the windscreen.