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Discussion Starter · #1 ·
I'm restoring a 1984 Toyota Pickup. The '90s era single-din receiver is coming out. A Sony XAV-AX1000 (dbl-din CarPlay) head unit is going in. I have a few questions (that will show my near absolute lack of knowledge in this space).

  • For the truck, I have a Metra 70-1398 receiver wiring harness. For the receiver, I have the Sony wiring harness. Can I assume that Sony and Metra are 100% in sync in their choice of wire colors - can I just match white to white, white/stripe to white/stripe, etc.?
  • The Sony receiver has a wire for the Parking Brake. Surely there's a standard hack here - to make the receiver think the brake is always on... right?
  • If I'm not using a backup camera, do I need to do something with the Reverse In wire, or will the receiver just ignore it unless it's connected?

Now, based those questions... are you thinking I should just take these three pieces to a shop and pay a pro to make the connections? Or is this not that complicated?
Thanks!

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For the truck, I have a Metra 70-1398 receiver wiring harness. For the receiver, I have the Sony wiring harness. Can I assume that Sony and Metra are 100% in sync in their choice of wire colors - can I just match white to white, white/stripe to white/stripe, etc.?
I have used well over a dozen Metra harnesses over the years, they've always been as simple as described. Given you are properly making the connections. Bad things can happen fast if the connection fails (loose, energized wire), or is not properly insulated.
 

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Not likely very complicated, earth the parking brake wire, and leave the reverse disconnected if not worried about a camera, it will likely be an option in the settings to take notice or ignore the wire as well
 

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Take the parking brake wire and connect it with ground in the radio harness. Then connect that to the ground. It makes it easier and looks cleaner.
Everything else is color coded.
As long as the harness plugs into the car harness you are good.
It's always a good practice to take the dash apart first and then wire up the harness once the kit and harness has been checked for fitment.
Wiring the harness is the easy part. Making sure you don't break any of 37 year old plastic is the hard part.
 

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If the head unit is new you will need more than just a ground the parking brake wire. They do sell $10 bypass modules for that though


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Discussion Starter · #6 ·
What are the odds - in a 37-year-old pickup, the factory harness is totally in tact! Almost all of the wires were directly aligned with the new harness. I'd call this one a 90% plug-and-play.

e39 touring, if the simple ground in the parking brake wire doesn't do it, I'll use one of those bypass modules - thanks!

Thanks for the help on this guys!

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Discussion Starter · #8 ·
Ha! I am loving this old truck - it is PURE '80s. It spent its life on an Angus beef farm. It was well used. I'm giving it a second life... and it's taking me back to the '80s. Oh, and that clock is correct!

306120


Some new metal, some new paint, some new wheels and tires, some new interior and a new new custom trayback.
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