420SEL (126.035) V8-4.2L (116.965) (1986)
Fresh/Recirculated Air Switch Testing
7.
Connect the ohmmeter to terminals 2 and 4.
8.
Depress the non-symbol side of the switch ("OFF"). The resistance should be:
Infinite resistance
9.
Release switch. The resistance should be:
0 - 1 ohm
If the correct resistance is not obtained, replace the switch.