4000S Models
- Check battery and voltage stabilizer for proper voltage. Disconnect wire from sending unit for fuel gauge. Connect Tester (VW 1301) between fuel gauge sending unit and ground. Start engine.
- With test dial setting at 60, fuel gauge should read 1/1. With dial set to 155, gauge should read 1/2. Set dial to 302 and gauge should read "RESERVE". Needle of gauge must be within range for each dial setting. Keep tester connected for a minimum of 1 minute to allow gauge needle to reach checking points