Voltage Limiter Test

Gauge failures are often caused by defective wiring or grounds. The first step in locating trouble should be a thorough inspection of all wiring, terminals and printed circuits. If wiring is secured by clamps, check to see whether the insulation has been severed thereby grounding the wire. In the case of a fuel gauge installation, rust may cause failure by corrosion at the ground connection of the tank unit.

1. Using a suitable voltmeter, connect one lead to the temperature sending unit and other lead to ground. Do not disconnect sending unit lead from sending unit.
2. Turn ignition switch to the On position and observe voltmeter.
3. A fluctuating voltmeter indicates that voltage limiter is operating properly.