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Home >> Volvo >> 2008 >> S40 T-5, FWD >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Central Electronic Module (CEM) Diagnostic Trouble Codes - 5 Of 10 (544 Body) >> CEM-8D04: High Level Stop Lamp. Signal Too Low (2004-2011) >> Signal Too Low (2004, 2005, 2006, 2007) >> Checking >> Checking Component And Wiring

Checking Component And Wiring

5-doors 

Check the voltage on the high level stop lamp connector terminal #1 to the output on the central electronic module (CEM). The voltage must be approximately 12 V when the high level stop lamp is activated.

Check the control signal cable. Check for a short-circuit to ground.

Take readings between:

Remedy as necessary.

4-doors 

Check the voltage on the high level stop lamp connector terminal #1 to the output on the central electronic module (CEM). The voltage must be approximately 12 V when the high level stop lamp is activated.

Check the control signal cable. Check for a short-circuit to ground.

Take readings between:

Remedy as necessary.

Other information 

Fig 1: Identifying Connector Terminals
GLL111062Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 2: Identifying Ohmmeter
GLL101042Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 3: Identifying High Level Stop Lamps
GLL140573Courtesy of VOLVO CARS OF NORTH AMERICA.