1998 Oldsmobile Cutlass BaseFACTORY OEM SERVICE PROCEDURE

History/Intermittent DTCS

  1. Intermittent failures may be caused by problems with electrical circuit. If a visual inspection does not locate problem, vehicle may be driven with a DVOM attached to suspect circuit. Abnormal voltage or resistance readings when problem occurs indicates problem is within that circuit.
  2. To check for possible loss of DTC memory, disconnect headlight connector and idle engine until SERVICE VEHICLE SOON indicator illuminates. Several DTCs should be set and stored in memory when ignition is turned to OFF position. If DTCs are not set as specified, BFC is faulty.
  3. If SERVICE VEHICLE SOON indicator is illuminated and no DTC is stored, check for an ignition coil shorted to ground and arcing at ignition wires. Also check for poor ground connections at BFC and instrument cluster.
  4. Check for electrical system interference (sharp electrical surge) caused by a faulty relay, PCM-driven solenoid or switch. This problem will normally occur when faulty component is operated.
  5. Check for improper installation of aftermarket electrical equipment (cellular phones, etc.). Ensure Ignition Control Module (ICM) wiring is kept away from generator. Check for open diode in A/C compressor clutch.
Factory Service Tools

Use the Manual With the Right Hardware

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

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.