OK this is so weird.
1992 Toyota Paseo 5spd 155,000 miles.
I let it sit a while, and the battery was low. It cranked and wouldn’t start because the battery was just too low. As I was getting out of the car, I noticed the gauge cluster lights flashing or something, I didn’t pay much attention at the time, but I unhooked the negative battery terminal [I was going out of town] to be safe.
So - I just charged the battery up. It’s showing 12.8 volts, 400 CCA - so not GREAT.
Also it pretty grody. And the positive terminal has a brass terminal with a screw connector for the ring terminals on the positive battery lead in the car to screw on to. It’s stuck on it’s terminal GOOD, and got pretty good green crud underneath it.
So - I install the battery. Instantly, no key in the ignition - the side markers start to flash, along with a relay click sound.
Look in the car, and the gauge cluster lights [not the “idiot” lights, the night time so you can see the gauges lights] are also flashing in time with the side markers.
turn the key, and the flashing stops. No crank though.
Screw around enough and the flashing stops.
Try to start the car, again no crank and after trying to start the car the flashing begins again.
& keeps going with the key removed.
It was night, so I just unhooked the negative battery terminal. But not after pulling the main relay under the hood & reinstalling, and pulling the EFI fuse and reinstalling.
Also hitting the hazard lights turns them on and lights up the blinker lights on the gauge cluster, which hadn’t been lighting up with the cluster lights.