I open the ecu, PCB is clean. It could be electric problem

My 2004 D2 sunroof has developed serious issues. Front sunroof opens automatically sometimes, then doesn't close until I restart engine one or two times, rear one pops up a little when engine starts, then opens fully later. I have checked switch continuity, they are okay. I think sunroof ECU...

I also like to fix engine cover problem, and tried M6, a bit small. @Andy Warren Have you made it? are M8x1.25 helicoil and M10x1.25 helicoil tool correct?

do you mean WG wire on D2 alternator? W wire provides a pulse signal, but the pin 86 must have constant high voltage e.g. >13.4v to keep the relay closed. In LR wiring, the relay is not closed until the engine starts.

Thank you for your solution Andy. There are two issues, Firstly, 30A to pin 30 might not be enough to deal with surge current for leisure batter/fridge on start. Secondly, the alternator is connected with the battery and has permanent power, the relay would still draw current on standby, the...

To be exactly, I have no idea of where the relay is connected to, the instruction points to somewhere under the passenger seat, I don't think that is correct. The 13-pin socket is going to be connected to caravan.

I am going to install PF jones 13-pin wiring kit as mentioned at the beginning. I know how to wire the socket, but its instructions are not clear on split-charge connection on the battery. I attached the instructions.

Thank you for your useful info. post-99 caravans have incorporated split-charge, 12S socket is not needed. Does it mean the pin 9 of 13-pin socket can be wired (>2.5 mm) to the battery straight way?

I have tested the pin 7 or 6 of 9-pin connector in rear o/s has permanent 12v, it could go to pin 9 of 13 pin socket.

Yes, the pin 10 goes to leisure battery/fridge in caravan. In car side, from STC50178, I see C572-1 is used to control the towing relay and C572-1 is controlled by ignition

Thank you for your detailed info sierraferry. I saw those pictures only before.

I intend to charge leisure battery/fridge, if two pins of the relay (voltage control mentioned in the instruction) are connected to the positive, the battery could be flat. The control pin should be controlled in some way see pic. I also attached the instruction. I have checked your link, there...

I am wondering if someone has installed PF jones 13-pin electrics https://www.ebay.co.uk/itm/292540303687. Its instruction is not clear on power connection. The seller said the manufacturer has no specific instructions, just connect to the battery. Obviously this is not correct, it should be...

Looking for tow bar electrics 13 Pin or 12N electrics kit

After the coolant was changed and a while ride, I found the coolant level dropped 1 to 2cm, then tried to top up, but the coolant level came back to the full mark. Does it mean there are still air trapped in the system?