Test D: Rear Defogger Test

TEST D: DEFOGGER TEST


With the Ignition Switch in RUN, and the Defogger Switch pressed ON, connect one lead of a test lamp to ground. From inside the car, lightly touch the other lead to each grid line and slowly move it along the length of the grid. The brilliance of the test lamp bulb should increase as the test lamp is moved from right (Passenger's side) to left (Driver's side).


^ If the test lamp does not light along any one of the grid lines, check PPL/WHT (293), BLK (293), PPL (192) and BLK (192) wires to the Defogger Control for an open (see schematic). If OK, do Test E.


^ If the test lamp bulb shows full brilliance at both sides of the grid, check the BLK (150) wire for an open (see schematic).

^ If the test lamp suddenly lights as it is moved along the grid, a break in the continuity of the grid line exists.