Help! Carplay wiring

Installing atoto f7 with

$8 metra 70-1761 radio wiring harness for toyota 87-up power 4 speaker

metra 70-1761 harness doing the amp bypass
Key on, no life. Plugged the oem amp and head unit back in, also not lighting up.
Where should I start with the diagnostic. Thx!

 

Start by checking the fuses, etc

 

Audio, audio upgrades and cameras...

• I'll say this first: DON'T BE A FRIGGIN' DOUCHE! Don't be that asshole who cuts the factory wiring harnesses to install a new stereo. There are a ton of cheap plug-and-play adapter harnesses you can buy. Pony up the extra $10-20 for a quality adapter harness and don't cut your factory wiring.
• Use proper wiring. Either butt splice, crimp, or solder. Don't use wire nuts, electrical tape, scotchloks, quicktaps, and other BS, they're garbage. If you must tap a circuit, use Posi-Taps to avoid damaging wire sheaths.
• These trucks were fairly well-equipped for the era with three basic radio setups: (1) A JBL radio with external JBL amplifier, (2) a "premium" radio with external OEM amplifier, or (3) a standard radio with no amplifier. If you have the JBL radio, it should have the JBL logo silkscreened onto the radio's face and amp, JBL brands everything with their logo.
• Before you install an aftermarket head unit, you must identify whether your truck has an OEM amplifier, b/c you'll need to adapt or bypass it to avoid issues! Read this thread for info on factory amp location(s) and how to bypass it for aftermarket stereos. There are ways to retain the factory amp if you really want to, but ... go read that thread for why it's not ideal. To see what adapters you need (if you have an amp) check this post. Foor 2003+ drivers, you need a dash trim kit, there are options! To see what aftermarket radio other members used, read this thread. DISCLAIMER: Confirm fitment of any part numbers provided here by going to Crutchfield's or Metra's website before you commit to buy!
• If you're looking to stuff a sub in the rear of your truck ... RC trucks, you'll need to use a wedge box behind the seat (link), or an under-seat shallow sub. AC trucks, Q-Logic makes a dual 8" box that goes under the rear passenger seat (info). DC trucks, storage cubbies below rear seats can be used (link, more here). JL has a stealbox that stuffs in the center console for trucks w/captains chairs.
• For AC owners, your rear doors have ample room for a 6x9" speaker, if that's your desire. As someone who worked in the industry, I'd take a 6x9" over a 6" component any day, I've seen guys do some pretty amazing stuff w/6x9s.
• Steering wheel controls and adaptation... To answer all your Q's, check this thread!
• For AC/RC trucks, the metal bracket used for the door tweeters can be repurposed to install any number of aftermarket components, example here.
• Consider buying through Crutchfield, not only for the incredible technical support, but they ensure you'll have all the wiring adapters and install accessories you need to for the most-plug-and-play experience possible. Free phone support from audio enthusiasts. Don't hesitate to call and talk to a technical salesperson to lay out your system before buying! It's also free, and they're super knowledgeable, they'll guide you in the right direction. To boot, their pricing is inexpensive - doesn't always beat scAmazon, but you're guaranteed to get non-counterfeit, non-grey market stuff with full, no-hassle extended warranty and support, which Amazon can't offer.
• For an example camera install using an aftermarket head unit, check this post.

 

Update and clarification
Installation is for a 00 with factory amp. I did removed the factory amp and used a bypass harness.
Both 15amp radio fuses (acc and comm) are good
Still troubleshooting

 

Are you trying this with the ac bezel/controls disconnected?

Iirc it has to be plugged in for the radio to get power.

 

You are absolutely right my good sir, thank you so much

 

I just learned this fun fact when I went back in to hook up the mic on my Alpine (that I didn't think I'd ever use).
Panic set in for a second until I figured that out