LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 1994 >> LeSabre Custom >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Anti-Theft System >> Testing >> Notes On INTERMITTENTS >> Incorrect Resistance Measurements Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Incorrect Resistance Measurements Check

  1. If problem happens with only one key, clean or replace faulty key. If condition is present with all keys, lock cylinder may be dirty/defective or there is a fault in key resistance circuit wiring, connections or contacts.
  2. Using ohmmeter, check key resistance. Disconnect PASS-Key II(R) decoder module, insert key in ignition and measure resistance across terminals B8 (White/Black wire) and B7 (Purple/White wire) of decoder module harness connector. Wiggle harness while performing test. Resistance should be within 10 ohms of resistance measured on key when it was removed from vehicle.
  3. If resistance is not within 10 ohms, determine if resistance difference is wiring, wiring connections, dirty key/lock cylinder contacts or defective lock cylinder.
  4. Rotate key through all positions and check for a change in resistance. A change of more than 10 ohms indicates a problem with lock cylinder or key contacts.
scientia non olet · About LEMON Manuals