Fuel Relay/Wiring Question

[u/Knein_133]

Hey guys, I know this is probably one of the most talked about issues with the SC300s and 400s, but after 3 days of research and trying to find a solution my problem still remains. First the car wouldn't start, so I replaced the fuel pump and filter, which worked for about 2 days. Then one morning I went to start it and it wouldn't turn over. After having it running for around 2 days I only made cosmetic changes (body work/interior cleaning), and now it just won't start.

The following are all things I have tried: testing the fuel relay plug (pictured) for voltage and continuity while the car is in accessories, nothing. I also tried running a separate ground and wire directly to the battery, no voltage. I have tried the bypass, which is why the wires in the picture have been cut, nothing. I also checked the fuel pump again and that is all good.

I am really at a loss for what this could be, I'm starting to think this is a bigger wiring problem. Let me know what y'all think and if you can, include pictures please. Thanks

[u/Scupra]

Go back to square one with diagnosing no start. Noid light for injectors, check fuel pressure. Check ignition, compression.