Just for the record, I think I figured out what the interior lighting contact is used for, it is (cpupd be) the constant plus. In case of 13 pin sockets, 7 pin sockets don't have one. Either way, I might just use it as a constant plus, saves me one cable. And if I leave the fridge pin of a 13...

I know that grill, looks goofy if you ask me. And those additional headlights obstruct air flow to the radiator. Another issue just came up, the manual window regulators are obsolete... Which means I somehow have to make the electric windows work again, after having removed the wiring in a less...

Those modern 7 pin sockets have nothing I would connect to the interior lights... Those have indicator lights, brake lights, fog lights, tail lights and a negative... Weird, really weird

She is registered as a commercial towing vehicle in the papers with a towing limit, pneumatic break system being installed, of 6.5 tons... Well, the suspension is certainly good! A bunch of things so far: Two wire colors differ between the Autospark harness and the wiring diagram, the one from...

Well, it can if someone made all the necessary mods, the pneumatic break and compressor have been removed by now, and got it registered as such. Lucky me one of the previous owners did! The trailer indicator light is behind the printed circuit in the dash, so I assume that is going to work as...

Behind the dash, all the wires should have been original, I didn't check when I dismantled which wire went were, but especially behind the speedo assembly there are not that many options. We'll see when I'm done, jist need to put already two properly colored cables from the split battery to...

Good point about the Trailer indicator light, I do get an indicator light in the original dashboard between the fuel gauge and speedo... I'll ask! Sounds like a minor thing to add so.

So, I learned something: 1) I need a 13 pin socket, those are mandatory by now for new trailers 2) if there is no dedicated kit for a certain car to connect the socket, apparently the connection goes directly to the tail lights 3) the constant plus and the ignition plus for the fridge...

So far, they never tested the function of the socket, not even lighting. As I replace the complete wiring of the car at the moment, I thought of doing the socket as well. After all, the tow bar is the perfect recovery point! Naively, I thought of simply plugging the indicator lights and so on...

That's what I found, so my first idea was to simply plug the lights into the rear harness as required, put two earth to the chassis and call it a day. I have no idea if that is the proper way to do it so, because I assume the trailer relay is there for a reason... 🤷

Germany, and since she rated to tow 6.5 metric tons I thibk I need a 13 pin, at least properly installed. Already asked a while ago, and the pneumatic trailer break system required for the 6.5 ton trailers is not needed to maintain the towing vehicle classification. Might be nice so for stuff...

So, with the old harnesses as good as gone all the previously installed wiring went out as well. That includes the 13 pin trailer socket. The car has what looks like a genuine indicator relay to be used for towing and the rear harness has a purple (weird color choice, the same as the interior...

So, if I want to do it right, and that's what I am doing at the moment, I use the proper bullet type connectors. Autospark had those in stock, hence I ordered a ton. Turns out I need a proper crimping tool, well, the rev meter will have to wait, another 80 bucks is out of the question for July...

I just found out what one of the wires on the coil is / was for: that's where the added rev counter took his input from. Good news, as it is an electronic one already calibrated for 8 cylinders, all I have to do is to connect it to the coil and the ignition positive at the fuse box, and a...

Rear harness almost in, engine harness connector labelled and routing figured out, dashboard removed, all after market wiring ripped out. Seems I have to pull out the heater unit as well, as the main harness passes behind it. There goes my TÜV end of July I assume, but we'll see!