Volkswagen Instrument Panels

Instrument cluster for most models includes speedometer, fuel gauge and temperature gauge. Optional instruments include clock, tachometer, voltmeter and oil temperature gauge. See Fig. 3. Printed circuit provides voltage to gauges. A voltage regulator attached to printed circuit controls voltage to fuel and temperature gauges. Most warning lights are a Light Emitting Diode (LED). To replace diode, pull from printed circuit socket. TESTING NOTE: Volkswagen Tester (VW 1301) is required for resistance tests. Tester settings are numerical. Settings do not indicate resistance in ohms. Manufacturer does not supply resistance values in ohms. VOLTAGE REGULATOR TEST 1) If only one gauge is inoperative, regulator is not defective. If both fuel and temperature gauges are inoperative, voltage regulator may be faulty or have a bad ground connection. 2) Partially remove instrument cluster. Position cluster so regulator can be reached with voltmeter probes. Leave chassis harness connected. Ensure ground connection at regulator is tight. 3) On all except Cabriolet, turn ignition on. Connect voltmeter negative(-) lead to terminal No. 2 of regulator. Connect positive () lead to terminal No 1. See Figs. 1 and 2. Meter reading should be 9.5-10.5 volts. If reading exceeds specification, replace voltage regulator. 4) For Cabriolet, turn ignition on. Connect voltmeter negative (-)