System Tests: Notes

CAUTION: Disconnect negative battery cable before disconnecting Generic Electronic Module (GEM) harness connectors. Failure to do so will result in GEM storing erroneous codes and may also result in erratic operation of GEM after reconnecting. When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.

NOTE: Perform all voltage and resistance tests using a Digital Volt-Ohm Meter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure. Use ohmmeter to isolate wiring harness shorts or opens.

SYMPTOM INDEX

Symptom

Perform Test

No Communication With Generic Electronic Module

Power Windows Completely Inoperative (Convertible)

Power Windows Completely Inoperative (Coupe)

Driver's Power Window Inoperative (Convertible)

Driver's Power Window Inoperative (Coupe)

Passenger's Front Power Window Inoperative

Left Rear Power Window Inoperative (Convertible)

Right Rear Power Window Inoperative (Convertible)

One-Touch Down Feature Inoperative

⁽¹⁾

Rear Window Defogger Does Not Operate

⁽²⁾

Rear Window Defogger Does Not Turn Off Automatically

⁽³⁾

⁽¹⁾	On convertible, perform TEST D: DRIVER'S POWER WINDOW INOPERATIVE (CONVERTIBLE) under SYSTEM TESTS. On coupe, perform TEST E: DRIVER'S POWER WINDOW INOPERATIVE (COUPE) under SYSTEM TESTS.

⁽²⁾	Perform TEST A: REAR WINDOW DEFOGGERS DOES NOT OPERATE under SYSTEM TESTS in REAR WINDOW DEFOGGER - MUSTANG article.

⁽³⁾	Perform TEST B: REAR WINDOW DEFOGGERS DOES NOT TURN OFF AUTOMATICALLY under SYSTEM TESTS in REAR WINDOW DEFOGGER - MUSTANG article.