1. Disconnect the negative battery cable..
2. Remove the following parts:
a. Upper panel.
b. Shift lever knob (MTX).
c. Selector lever knob (ATX).
d. Shift panel.
e. Side wall.
f. Console.
g. Auxiliary jack.
3. Connect a commercially-available nonresistant plug to the auxiliary jack.

4. Verify that the continuity between the auxiliary jack terminals is as indicated in the table.

If not as indicated in the table, replace the auxiliary jack.
Audio Unit Removal/Installation
Auxiliary Jack Removal/InstallationSae Standards
In accordance with new regulations, SAE (Society of Automotive Engineers)
standard names and abbreviations are now used in this manual. The table below
lists the names and abbreviations that have been used in Mazda manuals up to
now and their SAE equivalents.
...
Parking Brake Lever Inspection
Stroke Inspection
1. Pump the brake pedal a few times.
2. Pull the parking brake lever two to three times.
3. Inspect the parking brake stroke by slowly pulling at point A 50 mm {1.97
in} from the end of the parking brake lever with a force of 98 N {10 kgf,
22 lbf} and counting the number o ...
Filament Inspection
1. Turn the ignition switch to the ON position.
2. Turn the rear window defroster switch on.
CAUTION:
Directly touching the rear window defroster filament with the lead of the
tester could damage it. Wrap aluminum foil around the end of the lead and inspect
the filament by touc ...