Everything you need to assess your speaker system at this point is in the trunk. Don’t sweat any of the details between the trunk and the speakers for now. There’s a good chance that it’s all still OK. At least if they left the stock speakers. Fingers Crossed. It looks like all the other guy did was...

What I was asking is, are all of the ignition switch
wires connected where they're supposed to be?

All 70 series cars came with two antennas for the purpose of supporting Diversity Tuning equipped head units like the SC-816/900/901. In those cars, you’ll find a regular sized Motorola plug for the main antenna in the left window, and a mini-motorola plug for the sub antenna in the right. The left ...

If you need the entire line,
aftermarket is certainly out there.
You can start with eBay as a baseline.

A bluetooth adapter like this is probably the quickest and simplest:

https://www.ebay.com/itm/262888908829

viewtopic.php?t=104443

I haven’t used it myself, and it’s a little clunky,
but if you want to stay stock, it’s certainly an option.

To answer your post question, no. As long as you have clean copper, good quality 60/40 rosin core solder ( I prefer a smaller diameter, like .031" ) and can handle a soldering iron, this should be a non-issue. The shrink goes on first! Ask me how I know... Try to to use a good quality, dual-wal...

Had you been in that wagon, it would have protected you.
I say Return the Favor and let it live on as a Wreckreational Vehicle.

Assuming the stereo is OK... Stereo’s OK, right? That’s kinda everything.

May the Force Be With You!

Just for grins, where is your voltage level
hanging out when the car is running.
I’ve never heard of low system voltage
causing that particular problem, but
it’s always a good thing to consider
with electrical problems.

A lot of folks seem very happy with the TYCs. Glad they worked out.
Depot Jewels are also pretty reasonable these days, too.

Volvo uses different fobs and receivers
in a number of worldwide markets. What
affects Volvo fobs in Europe may not
apply to cars in the US.