V70: Electrical 12v feed in boot for towbar electrics

[apersson850]

According to the schematics, it's like this:

Connector 1 (C1) is for the 12 V feed to the TRM. Fused 40 A.
C2 is for other inputs, CAN-bus included.
C3 is for outputs to the trailer socket. In this connector. C3:2 is for switched 12 V output to the connector.

This is from the schematics for 13 pole connectors. This 12N / 12S thing is something local to the UK, I think, so it's not specifically listed.

[kinga]

Sorry for appearing thick, but what/where are the connectors you are referring to?

The connectors I mentioned in my last post are..

Thick black/red to thin red/blue & red/yellow..



These red/blue & red/yellow wires to fuse & back into the TRM..



Black & yellow signal wires to all the feed wires entering the TRM..



And the TRM..

[apersson850]

They are on the TRM. But since you don't have the real TRM from Volvo, but a simpler version, it looks like they don't exist on your module.
Volvo's TRM has three connectors (at least according to the schematics; I've not been out looking at my TRM in the real world). One for main power supply, a second for auxiliary inputs, including CAN, and a third out to the trailer socket.

That third connector, a 12-pole one, supplies up to eight wires to the trailer socket. Then the rest are ground and that permanent 12 V supply, which is independent of the TRM.

Now you have a different unit, so it doesn't have the same connections. But perhaps we can sort it our anyway.

CAN is of course the CAN bus.
30 is constant + 12 V
31 is ground
R and L are turn indicators.
58R and 58L are tail lights, on each side.
54 is brake light and 54H usually implies a high-up brake light.

That leaves I/O, NSL and RFL to be explained. Right connectons home page is full of marketing but lacks detailed technical information. thus I don't know if any of these additional connections are useful to you. Maybe somebody else has more information about that?