Pinpoint Test A: The Courtesy Lamps Do Not Turn On With A Door Open
Interior Lighting
Pinpoint Tests
Pinpoint Test A: The Courtesy Lamps Do Not Turn On With A Door Open
Refer to Wiring Diagram Set 117, Remote Keyless Entry and Alarm for schematic and connector information. Diagrams By Number
Normal Operation
The Smart Junction Box (SJB) sends a voltage reference signal to the door ajar switches through circuits CPL26 (GN/VT) (LH front door), CPL31 (WH) (RH front door), CPL36 (GN) (side door or body builder connector for cutaway vehicles) and CPL39 (YE) (RH rear door). Ground is provided to the LH front door ajar switch through circuit GD133 (BK), the rear door ajar switch through circuit GD149 (BK/GY) and all other door ajar switches through circuit GD115 (BK/GY). The door ajar switch is open with the door closed. When the door is opened, the signal to ground is completed, indicating an open door to the SJB.
When any door is opened or an unlock request from a programmed Remote Keyless Entry (RKE) transmitter is detected, the SJB provides voltage to the courtesy lamps.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Door ajar switch
- Body builder equipment
- SJB
PINPOINT TEST A: THE COURTESY LAMPS DO NOT TURN ON WITH A DOOR OPEN
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
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A1 CHECK THE COURTESY LAMP OPERATION FROM THE INSTRUMENT PANEL DIMMER SWITCH
- Ignition OFF.
- Place the instrument panel dimmer switch in the DOME LAMP position.
- Do the interior courtesy lamps illuminate?
Yes
GO to A2.
No
Go To Pinpoint Test C. Pinpoint Test C: The Interior Courtesy Lamp(s) Are Inoperative
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A2 CHECK FOR VOLTAGE TO THE DOOR AJAR SWITCH
- Disconnect: Suspect Door Ajar Switch or Body Builder Connector C3359.
- Measure the voltage between the suspect door ajar switch or body builder connector, harness side and ground as follows:
- Is the voltage greater than 10 volts?
Yes
For the body builder connector, REFER to the body builder information to continue diagnosis.
For any door ajar switch, GO to A3.
No
GO to A4.
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A3 CHECK FOR VOLTAGE TO THE DOOR AJAR SWITCH USING THE CONNECTOR GROUND
- Measure the voltage between the suspect door ajar switch connector, harness side as follows:
- Is the voltage greater than 10 volts?
Yes
INSTALL a new door ajar switch in question. TEST the system for normal operation.
No
REPAIR the ground circuit in question for an open. TEST the system for normal operation.
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A4 CHECK THE DOOR AJAR SWITCH CIRCUIT FOR AN OPEN
- Disconnect: SJB C2280c.
- Measure the resistance between the suspect door ajar switch or body builder connector, harness side and the SJB as follows:
- Is the resistance less than 5 ohms?
Yes
GO to A5.
No
REPAIR the circuit in question for an open. TEST the system for normal operation.
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A5 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new SJB. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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