Section 109 (Lighting Systems): General Description: Precautions

WARNING: This page is about a different car, the 2003 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.

Before disassembling or reassembling parts, always disconnect the battery ground cable. When replacing the radio, control module, and other parts provided with memory functions, record the memory contents before disconnecting the battery ground cable. Otherwise, the memory will be erased.
Reassemble in reverse order of disassembly, unless otherwise indicated.
Adjust parts to the given specifications.
Connect the connectors and hoses securely during reassembly.
After reassembly, make sure functional parts operate smoothly.

WARNING:

The air bag system wiring harness is routed near electrical parts and switches. All air bag system wiring harnesses and connectors are yellow. Do not use an electric test equipment on these circuits.
Be careful not to damage the air bag system wiring harness when servicing electrical parts and switches.