Electrical Grounds - Locations/Fault Diagnostics

Article No.
02-12-2

06/24/02

ELECTRICAL - VEHICLE SYSTEMS GROUND
LOCATIONS - INTERMITTENT FAULT DIAGNOSTIC TIPS

LINCOLN:
2000-2002 LS

Article 00-25-7 is being republished in its entirely to update the model year coverage.

ISSUE

The Lincoln LS electrical system is of a multiplex design. Multiplexed electrical systems rely very heavily on the integrity of the component and circuit grounds to function correctly. Intermittent electrical faults may be caused by a poor ground.

ACTION

When diagnosing any intermittent electrical faults, the grounds for the affected system or component should be inspected for proper connection and integrity. Poor or high resistance grounds can affect the operation of modules, relays and other components, but may not generate trouble codes. Refer to the following Ground Location Chart for ground locations and descriptions of which components/systems are on each specified ground.

GROUND LOCATIONS AND DESCRIPTION





Refer to Figure 1 for Vehicle Ground Location overview.








Ground Location table

NOTE
TO PROPERLY INSPECT A GROUND, FIRST COMPLETELY REMOVE THE FASTENER RETAINING THE GROUND TO THE VEHICLE. INSPECT EACH INDIVIDUAL GROUND EYELET FOR DAMAGE TO THE TERMINAL AND WIRE. REPAIR DAMAGE AS NEEDED TO RESTORE THE CONDUCTIVITY OF THE GROUND. THROUGHLY CLEAN, REASSEMBLE AND TORQUE THE GROUND FASTENER TO THE RECOMMENDED VALUE FOUND IN THE APPROPRIATE WORKSHOP MANUAL.

OTHER APPLICABLE ARTICLES: NONE
SUPERSEDES: 00-25-7
WARRANTY STATUS: INFORMATION ONLY

OASIS CODES: 102000, 103000, 104000, 112000, 201100, 201200, 202000, 203100, 203200, 204100, 204200, 205000, 206000, 207000, 208000, 208300, 303000, 501000, 502000, 504000, 601300, 603300, 698298





G100





G101





G102





G103





G201





G202 and G203





G204





G300





G301





G302





G324





G400





G401





G403