I went to wire up a spare tr7412ub-or I had and do a trunk amp delete and discovered that '87 premium sound harnesses (1381719) only had a single radio output ground wire, so I ended up repurposing the four + speaker leads at the head unit that run to the trunk as rear speaker +/-, redirected to the rear speakers at the trunk amp connector, and just ran separate front speaker wires to the deck.
In this harness the red/green that is almost always constant 12v was 12v headlight on, aka dimmer, which I found super odd. Swapped what I had wired to orange and yellow and all was happy. I then remembered that I had a super nice set of four Polk 5.25" mids that I installed, and the whole setup sounds great. Really caught me off guard as I was quite proud of hoopties fresh premium sound with a class d head unit amp, and now it's got me questioning all the things.
I need to button up the glovebox area, put some hardware in the front splash shields, toss a passenger seat in this thing and start whipping it. The brakes feel not great despite being good components, so a further bleed may be required with two people vs the "stick bleeder hose in a bottle of brake fluid" method I tried.
I have a Momo Cavallino I'm going to run for the finishing interior touch.
Hopefully we'll see winter turn right about when I'll have this thing road worthy for some daily duty until someone wants it more than I do.
My goodness I love hoopties.





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