Hey guys, I have a '99 ES300. I just did a bunch of work on it, culminating in a new radiator and A/C condenser yesterday. Started it up for the first time in weeks last night with a fresh alternator and battery, and took it for a test drive. Apart from the alignment, everything else was peachy.
This morning, I tried to start it, and it was behaving very weirdly.
1. The "door open" light was flickering and getting fainter
2. With the door open, I stuck in the key, and the chime started for a half second, then stopped abruptly. When it stopped, the dash went dead. Turning it to ON, I could see the dash lights lit up, but extremely faintly...and it didn't look like it was running the light test (none went off).
3. I tested the battery, and it was good. Swapped in two known good batteries, same thing. Also cleaned all grounds, no change.
4. I waited a while, then went back out and tried again: KOEO, everything was behaving normally...chiming with door open, dash light test finished. As soon as I tried to start the car, I heard a loud click from what I assume is the starter relay, and everything went dead again. Same thing from this point on: see #2.
I checked all the fuses and relays, everything is in working order. Any ideas?
Thanks as usual.
Stock vs tuning box alone vs ecu tuning ontop of tuning box. 
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