CTS Wagon RWD V6-3.6L (2010)
With a Test Lamp
1. Remove the power feed (i.e. fuse, control module) from the suspect circuit.
2. Disconnect the load.
3. Connect one lead of the test lamp to battery positive voltage.
4. Connect the other lead of the test lamp to one end of the circuit to be tested.
5. If the test lamp illuminates, there is a short to ground in the circuit.
Fuse Powering Several Loads
1. Review the system schematic and locate the fuse that is open.
2. Open the first connector or switch leading from the fuse to each load.
3. Connect a DMM across the fuse terminals (be sure that the fuse is powered).
*
When the DMM displays voltage the short is in the wiring leading to the first connector or switch.
*
If the DMM does not display voltage refer to the next step.
4. Close each connector or switch until the DMM displays voltage in order to find which circuit is shorted.
Troubleshooting with a Digital Multimeter
Troubleshooting with a Digital Multimeter
Special Tools
J 39200 - Digital Multimeter (DMM)
Caution: Refer to Test Probe Caution (See: Service Precautions/Vehicle Damage Warnings/Test Probe Caution).
Digital Multimeter (DMM) Basic Requirements
Service information is validated using digital multimeters that meet or exceed the following requirements. Using a multimeter that does not meet these
basic requirements may give inaccurate readings which could lead to an incorrect diagnosis.
Display and Settings
1. Four digits displayed
2. Voltage, amperage, resistance, frequency, diode test settings, and min-max function
3. Display positive and negative values
Voltage
1. Have at least 10 Mohm input impedance
2. Test a DC voltage range of 0.1-1000 V.
3. Test an AC voltage range of 0.1-1000 V.
Amperage
1. Test a DC amperage range of 0.1µA-10 A.
2. Test an AC amperage range of 0.1µA-10 A.
Resistance
Test a resistance range of 0.1 ohm-40 Mohm and displays infinite for a value greater than 40 Mohm (O.L. (Over-load))
Frequency
Test for a frequency range of 0.5 HZ-199 K HZ
Diode Test
1. Apply at least 1 mA when performing the diode bias test
2. Display the break over voltage drop (0-3 V) of a forward biased diode
3. Display infinite (O.L. (Over-load)) when a diode is reverse biased
Min-Max Readings
1. Can update at a 1 ms sample rate
2. Saves and displays minimum and maximum values