24-153
      
Checking voltage supply  
    
If LED does not light up:  
 Electrical Wiring Diagrams, Troubleshooting & Component Locations   
If LED lights up:  -  Connect VAG1527B voltage tester as follows:Harness connector  
Terminal  
Measure to  
1   Chassis Ground (GND)  
-  Switch ignition on.
 
LED must light up. 
-  Check wire connection from terminal 1 of connector to fuse for open 
circuit: 
-  Repair open circuit if necessary.
- Checking activation.
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