This circuit sends a microphone voice signal from the extension module to the radio and display receiver assembly.
Using this circuit, the extension module disables the microphone function of the radio and display receiver assembly to receive a microphone voice signal from the telephone microphone assembly.
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - EXTENSION MODULE)
Disconnect the radio and display receiver assembly connector.
Disconnect the extension module connector.
Measure the resistance according to the value(s) in the table below.
REPAIR OR REPLACE HARNESS OR CONNECTOR