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.
1993 Chrysler ImperialFACTORY OEM SERVICE PROCEDURE
Test 3B - Diagnosing Lock Signal To Body Control Module
NOTE:
For connector terminal identification, see CONNECTOR IDENTIFICATION
. For wiring diagrams, see WIRING DIAGRAMS
at the end of this article.
- Using DRB-II, stop door lock actuation test. Remove key from ignition switch. Using DRB-II, read key in ignition switch status. If DRB-II displays CIRCUIT CLOSED, go to TEST 47A.
- If DRB-II did not display CIRCUIT CLOSED, put DRB-II in voltmeter mode. Turn ignition off. Disconnect Body Control Module (BCM) Black connector. BCM is located behind right kick panel. Check connector condition, and clean or repair connector as necessary.
- Check voltage on terminal No. 4 (Orange/Violet wire) of BCM Black connector. While observing DRB-II, lock doors using left door lock switch. If voltage is more than 10 volts, replace BCM. Perform VERIFICATION PROCEDURE VER-1. If voltage is less than 10 volts, check door lock wiring and switch. Repair as necessary. Perform VERIFICATION PROCEDURE VER-1.
Factory Service Tools
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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.
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