So a little project to keep myself from climbing the walls. After getting my FBH back up and running I tested it by unpluging the 3 wire plug from the remote unit in the boot and then joining the +12v to the signal wire. The FBH and interior fans then start up and run until you disconnect the wires or I think it turns off on its own after 30 mins (did not test this theory however) what I did notice is within 10 minutes the interior was toasty so it does not need that long to do its job.

I was thinking about getting a key fob to switch it on and off. However after looking at the price and after reading this...

https://motor-roam.co.uk/l322-range-rover-...-10-pounds

I took a closer look at this option.

Being that this article used a WIFI switch then it would only work when you are at home and connected to your wifi network...

Then I saw someone had added a GSM gate opener on one of the FB Groups so I ordered one off Amazon for £25.00
https://www.amazon.co.uk/gp/product/B083TS...&psc=1

So once I got the GSM gate opener I looked through the instructions and basically you have the option of either calling it or texting it or using an APP. Via text and the APP or calling it you can manually turn it on and then you have to do the same again to turn it off. There is a time delay function but maximum is 9 seconds. (no good for the FBH which needs a constant 12v signal to run) and I would forget to turn it off if I used the manual on/off function.

So I have expanded on the idea and added a time delay relay into the equation which once it receives the trigger signal from the gate opener it closes the relay for a set amount of time, I can now set the timer as needed and so during the winter months it might be 15 minutes (enough to warm the car and defrost on a cold day, in Spring when its a bit warmer then perhaps only 10 mins. The idea being not to spank the battery too much if its not needed.

Click image to enlarge

And before anyone says anything yes it does look like some sort IED timer Im guessing its pretty much how they are made !. L322 2007 TDV8 3.6

Hey Chris,

Nice write up, much more cost-effective than a replacement fob.

Just ordered the bits for this mod!! Looking forward to getting it fitted and ready for winter

Can I just ask how you checked the current draw? Where did you connect your meter too?

Cheers

Hi Bolert, THe meter needs to be put in line on the positive cable from the battery, you need a meter that can handle upto 10amps draw as when you connect it all up the RR will draw a high current initially as it sorts itself out, then leave for an hour and see what your draw is at this point. L322 2007 TDV8 3.6

Neat, although I’m surprised GSM is still in use in the UK. It was turned off in Oz a few years ago and 3G will be going off shortly.

The turn off of GSM was a bit annoying, it meant the phone in my L322 no longer worked, nor did the tracker in my motorbike. Ron B. VK2OTC
2003 L322 V8 Auto
2007 Yamaha XJR1300
Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA