Pinpoint Test B: The Sunshade Does Not Go Down When the Selector Lever is Put Into Reverse

Sunshade

Pinpoint Test B: The Sunshade Does Not Go Down When the Selector Lever is Put Into Reverse

Refer to Wiring Diagram Set 104, Power Sunshade for schematic and connector information. Diagrams By Number

Normal Operation

The sunshade module is tied into the backup lamp relay through circuit CLS10 (GN/BN). When the backup lamps are activated, the sunshade module sees the voltage signal and lowers the sunshade, regardless of the sunshade position.

This pinpoint test is intended to diagnose the following:

- Sunshade module

- Wiring, terminals or connectors

PINPOINT TEST B : THE SUNSHADE DOES NOT GO DOWN WHEN THE SELECTOR LEVER IS PUT INTO REVERSE

B1 CHECK THE BACKUP LAMPS FOR NORMAL OPERATION

- Ignition ON.

- Place the selector lever into reverse.

Do the backup lamps illuminate?

Yes
GO to B2.

No
REFER to Lighting and Horns to diagnose the inoperative backup lamps.

B2 CHECK CIRCUIT CLS10 (GN/BN) FOR AN OPEN

- Disconnect: Sunshade Module C3340.

- Ignition ON.

- Measure the voltage between sunshade module C3340-4, circuit CLS10 (GN/BN) and ground with the selector lever in reverse.





Is the voltage greater than 10 volts?

Yes
INSTALL a new sunshade module. REFER to Sunshade Module . TEST the system for normal operation.

No
REPAIR the circuit. TEST the system for normal operation.