1999 Subaru Impreza Owner's Manual - Page 229

Starting and operating J Trailer lights CAUTION Direct splicing or other improper connection may damage your vehicle's electrical system and cause a malfunction of your vehicle lighting system. Consult your authorized SUBARU dealer concerning the connection of wires for trailer lights. Check for correct operation of the turn signals and brake lights each time you hitch up. J Side mirrors After hitching a trailer to your vehicle, check that the standard side mirrors provide a good rearward field of view without significant blind spots. If significant blind spots occur with the vehicle's standard side mirrors, use towing mirrors that conform with Federal, state/province and/or other applicable regulations. J Tires WARNING Never tow a trailer when the temporary spare tire is used. The temporary spare tire is not designed to sustain the towing load. Use of the temporary spare tire when towing can result in failure of the spare tire and/or less stability of the vehicle and may lead to an accident. Make sure that all the tires on your vehicle are inflated to the pressure specified on the tire placard located on the left center pillar of your vehicle. - CONTINUED- 7-47