Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Test 16A: Traction Control Switch
1999 Chrysler LHSSECTION Test 16A: Traction Control Switch
- Turn ignition off, and then on. Press traction control switch several times while observing Amber traction control warning (TRAC OFF) light on instrument cluster. Traction control switch is mounted on instrument panel, to right of steering column. If TRAC OFF light turns on and off while pressing switch, traction control switch is operating properly. If TRAC OFF light does not turn on and off while pressing switch, go to next step.
- If TRAC OFF light remains on, replace instrument cluster. If TRAC OFF light does not turn on, go to next step.
- Turn ignition off. Disconnect traction control switch connector. Using an ohmmeter, check continuity between traction control switch sense circuit (Red/Yellow wire) and ground circuit (Black/Light Green wire) of traction control switch while pressing switch. If continuity exists while pressing switch, go to next step. If continuity does not exist while pressing switch, replace traction control switch.
- Turn ignition on. Using a voltmeter, measure voltage at traction control switch sense circuit (Red/Yellow wire) of traction control switch harness connector. If voltage is 9 volts or less, go to step 6) . If voltage is more than 9 volts, go to next step.
- Using a voltmeter, measure voltage between traction control switch sense circuit (Red/Yellow wire) and ground circuit (Black/Light Green wire) of traction control switch harness connector. If voltage is 9 volts or less, repair open in ground circuit (Black/Light Green wire) between traction control switch and ground connection. If voltage is more than 9 volts, replace instrument cluster.
- Turn ignition off. Disconnect 10-pin instrument cluster connector C2 (Blue). Inspect connector for pushed-out terminals, damaged terminals, or miswired terminals. If all terminals are okay, go to next step. If terminals are defective, repair as necessary.
- Turn ignition on. Using a voltmeter, probe traction control switch sense circuit (Red/Yellow wire) of instrument cluster connector C2 terminal No. 8. If voltage is one volt or less, go to next step. If voltage is more than one volt, repair short to voltage in traction control switch sense circuit (Red/Yellow wire) between traction control switch and instrument cluster.
- Turn ignition off. Using an ohmmeter, check resistance of traction control switch sense circuit (Red/Yellow wire) of instrument cluster connector C2 terminal No. 8. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in traction control switch sense circuit (Red/Yellow wire) between traction control switch and instrument cluster.
- Using an ohmmeter, check resistance of traction control switch sense circuit (Red/Yellow wire) between instrument cluster connector C2 terminal No. 8 and traction control switch harness connector. If resistance is less than 5 ohms, replace instrument cluster. If resistance is 5 ohms or more, repair open in traction control switch sense circuit (Red/Yellow wire) between traction control switch and instrument cluster.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.