94 Camry LE Sedan 2.2,
After complete Engine Swap. Had one Code on ECT guess I broke it on Engine install RR it code cleared. Runs Great now.

The Engine Swap to me about 30 days, Left my 1/2012 Battery on wood took to Parts store to check if it need a charge it tested good and full charge.

Then started the next day the Light Failure Warning light and the Battery Discharge Light Flashing at same time while driving down road.

Had Parts Store test Charging sys said the Alt working good need new Battery.
RR Battery Lights Still Flashing together.

I took to a shop I knew that work on imports. They said the Light Failure Sensor is Obsolete for that year. They have found if the board is not burned. That sometimes one or two the solder connection come lose, Suggested that I try re-Heat the solder points with a pencil solder iron.
Tried that now the Light Failure Warning - Battery Discharge Light on same time solid.
All tail Lights work.
Key off no lights. Key ACC no Lights (if seatbelt is Buckled). Key ON and after Cranking Lights Stay on and NO codes.
Found a 96 Light Failure Warning Sensor at junkyard it didn't Help, Then I read here in this forum that 93-95 gen 3 Sensors only. Found a 94 Sensor on ebay its in the mail I hope.

Was thinking to Pull each Bulb and checking the Sockets.

My mean concern is Both lights Flashed on now Solid.

Does anyone Know where the two circuits in the same Harness. Seem to me in my Reading they are 2 different areas.

 

kind of annoying that

this wasnt there before the engine replace

I was thinking a loose connection

draw/voltage leak at starter motor or ign barrel

I though light bulb warning meant a blown bulb ..try them on at night

other thing less likely ..was a fault in the instrument panel printed circuit

you can get fault codes out of this model
post back if you have any numbers

try the paper clip in the diagnostic plug trick and no fault codes
the cap lid has the pin layout so you bridge TE1 and E1 for the diagnostic engine light to flash the codes