Temperature Gauge Test

CAUTION: DO NOT connect sender wire directly to ground during test.

Disconnect temperature sender wire from sending unit. Connect a 12-volt, 3.4-watt test bulb between connector terminal and ground. Turn ignition switch to ON position. Bulb should flash and temperature gauge needle should move. If test light does not flash and gauge needle does not move, repair wiring to sending unit.
If test light flashes and gauge needle moves, remove thermosensor (sending unit) from engine block and place sending unit in hot 158°F (70°C) water. Check sensor resistance with an ohmmeter. Thermosensor resistance should be 90-117 ohms at 158°F (70°C) on all models. Replace thermosensor if not operating within specification.
Remove instrument cluster from instrument panel. See REMOVAL & INSTALLATION . Measure resistance between the temperature gauge terminals at the rear of the cluster. Refer to TEMPERATURE GAUGE RESISTANCE SPECIFICATIONS .

TEMPERATURE GAUGE RESISTANCE SPECIFICATIONS

Terminals ⁽¹⁾

Ohms

A-B

130

A-C

B-C

162

⁽¹⁾	For location of temperature gauge test terminals, see Fig 1 .

Fig 1: Laser, Talon Temperature Gauge Resistance Check Terminal ID

Courtesy of CHRYSLER MOTORS.