Operation CHARM: Car repair manuals for everyone.

Lighting and Horns: Service and Repair

When replacing a part that requires a special procedure (such as a lens and housing sealed together), follow the instructions normally included in the replacement parts package.
When removing a part that requires special sealing items (such as sealing washers), be sure to reinstall those items when replacing the part. Also, if any body sealing items (grommets, etc.) are disturbed, be sure to repair/replace them so the passenger compartment remains properly sealed.
Take care to prevent waterleaks if the sealing surfaces are disturbed. Damaged gaskets must be replaced. If necessary, use sealer (body caulking compound or equivalent) in critical areas or any area where the gasket doesn't seal properly.