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Home >> Buick >> 1994 >> LeSabre Custom >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Anti-Theft System >> Testing >> Universal Theft Deterrent (UTD) System Testing >> Remote Accessory Control (RAC) Module Input/Output Test

Remote Accessory Control (RAC) Module Input/Output Test

  1. Disconnect RAC module Blue 8-pin connector. To check key lock input, hold left or right front door lock cylinder switch in UNLOCK position. Using an ohmmeter, ensure continuity is present between module connector terminal "A" (Light Green wire) and ground. With door lock cylinder switch in any other position, no continuity should be present.
  2. If continuity checks are not as indicated, check Light Green wire for an open or short circuit to ground. Check suspect door lock cylinder switch for correct terminal contact. If wiring and connectors are okay, replace suspect door lock cylinder switch.
  3. To check tamper switch input, activate trunk lid tamper input. Connect an ohmmeter between module connector terminal "B" (Light Blue wire) and ground. Continuity should be present. With trunk lid tamper input not activated, no continuity should be present.
  4. If continuity checks are not as indicated, check Light Blue wire for an open or short circuit to ground. Check tamper switch connector. If wiring and connector are okay, replace tamper switch.
  5. To check SECURITY indicator control, connect jumper wire between terminal "C" (Dark Green wire) and ground. SECURITY indicator should light. If indicator does not light, check bulb and wiring. If bulb and wiring are okay, check RAC connector for good terminal contact. If terminal contact is okay, replace information center.
  6. Ensure battery voltage exists between connector terminal "H" (Black wire) and ground. If battery voltage does not exist, check Black wire for open circuit. Connecting terminal "H" to ground should cause horns to sound. If horns do not sound, check horn relay and wiring.
  7. Ensure battery voltage is present between connector terminal "G" (Black/White wire) and ground. If battery voltage is not present, check wiring to lamp control module. If wiring is okay, replace lamp control module.
  8. Using a jumper wire, jump connector terminal "G" to ground. Headlights and parking lights should light. If they do not light, replace lamp control module.
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