Two problems related to dash wiring have been reported for the 1999 Toyota Camry. The most recently reported issues are listed below.
Signal lights and emergency flashers defected (won't flash). Replace fuses and under the brake pedal part (don't know the correct name) several times and it work for maybe two weeks, then stop. Mechanic stated its an electrical problem; also hear like a frying noise when using signals and sometimes when just driving. Inside car light works when it wants too. Replace with recommended fuse and works for a day and stops.
The check engine light came on in may of 1999 they then replaced the transmission and the entired computer system. Now the check engine light is on again.