 Wizard
					
					
						Supporter
					
					
						Wizard
					
					
						SupporterNicky,
You just turn the radio on. No need to do anything with the accessory stuff. Just the radio switch will get it going until the car turns it off for you as the others have stated. When it turns off, just turn the radio back on.
Bob
2010 D4 3.0TDV6 SE, ediff, LLAMS, 5 x GOE wheels, LT285/60R18 BFG K02's, GOE Compressor Guard, LR Tank, Mitch Hitch, ECB Bull Bar, Kaymar Rear Bar, Traxide, Safari Snorkel.
2019 Discovery 5 SD6 SE, 20 inch wheels, 275/55R20 Nitto Grappler G2 tyres
 Master
					
					
						Supporter
					
					
						Master
					
					
						Supporter 
 
		2003 D2a Auto TD5 good Landy gone
2015 D4 probably the most amazing yet, why get a RR?
That thread is for the accessory sockets. Relay R1 (mini) is activated by the BCM which de-energizes it some minutes after the engine is stopped. R1 feeds two fuses F55 & F63 (this is for MY12 and others, check different MY's as they have varied). F55 powers the centre and rear outlets and F63 powers the drivers side front socket. R3 (micro) operates in the same manner and goes through F53 and powers the passenger side front socket.
These relays are intended as power saving devices in that they disconnect any load in these sockets as the vehicle shuts down reducing the chance of running down the main cranking battery.
I realize you are speaking of the D4 but I wondered if the D4 radio head has a diagnostics setup like my LR3.
Following the procedure below, I was able to stop the radio from shutting down due the low battery power function. Perhaps this procedure or a similar one exists for the D4 as well.
To access the diagnostics pages on theradio head, the procedure is as follows:
Ignitionmust be in position II or better yet, have the engine running and be in Park.
- Turnradio off if it's already switched on.
- Turnradio on by pushing the left knob and, within a few seconds of turning it on.
- Pushand hold the right knob in for about 10 seconds (or until the display changes).
- Youshould then see the Serial Number and some other stuff displayed.
- Pushand hold the right knob in again foranother ten seconds or so and the display should change again.
- Turnthe right knob to scroll through the pages of data, some of it unreadable code.
- Eventually,you will reach the page that shows you the voltage and FBH temperature.
- The 1VOLT number may show as about 135; the right volt number is the approximatevehicle voltage, 14.1 in my jpg as the engine is running.
- Holdthe number 1 keypad button down and the 135 number will slowly decrease.
- I heldit until the number reached 118.
- The 118number seems to be good enough that the radio seems to not do the Low PowerShutdown thing.
This is a You Tube video showing how to access the radio head diagnostics.
[ame]https://www.youtube.com/watch?v=3hfAfGofb70&feature=youtu.be[/ame]
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