1993 Buick Roadmaster BaseFACTORY OEM SERVICE PROCEDURE

Circuit Description

When unlock button on transmitter is pressed, keyless entry receiver grounds circuit No. 156 to activate courtesy lights and start an internal timer. If internal timer reaches 30 seconds or ignition switch is turned to RUN, keyless entry receiver removes ground on circuit No. 156. Keyless entry receiver senses voltage from fuse No. 17 on circuit No. 39 when ignition switch is turned to RUN to reset internal timer.

NOTE: Test numbers refer to numbers on diagnostic chart.
Factory Service Tools

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Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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