Neutral Switch (M/T)
WARNING: This page is about a different car, the 1995 Mazda MX-6 and 1995 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect neutral switch. Using ohmmeter, check continuity between switch terminals. Ensure continuity exists with transmission in Neutral and does not exist in any other gear. Replace switch as necessary.