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.
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HOMESERVICE MANUALSCHRYSLER1993LEBARON LANDAUREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLANTI-LOCK BRAKE SYSTEM - BENDIX-6SELF-DIAGNOSTIC TESTSTEST 12B MODULATOR FAULT (LEFT FRONT BUILD/DECAY VALVE)
1993 Chrysler LeBaron Landau
Test 12B Modulator Fault (Left Front Build/Decay Valve)
1993 Chrysler LeBaron LandauSECTION Test 12B Modulator Fault (Left Front Build/Decay Valve)
NOTE:
For connector terminal identification, refer to CONNECTOR IDENTIFICATION
. For wiring diagrams, see WIRING DIAGRAMS
.
- Turn ignition off. Disconnect CAB 60-pin connector. Put DRB-II in ohmmeter mode. Using DRB-II, check resistance of modulator assembly 10-pin connector Brown/Yellow wire. If resistance is less than 5 ohms, repair short to ground in the Brown/Yellow wire. Perform VER-1A . If resistance is more than 5 ohms, go to next step.
- Connect a jumper wire between chassis ground and CAB 60-pin connector terminal No. 42 (Brown/Yellow wire). Using DRB-II, check resistance of modulator assembly 10-pin connector Brown/Yellow wire. If resistance is less than 5 ohms, replace CAB. Perform VER-1A . If resistance is more than 5 ohms, repair open Brown/Yellow wire. Perform VER-1A .
RENDER: 1.0x
NO RELATED
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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.