1989 Geo Tracker LSi, AutomaticFACTORY OEM SERVICE PROCEDURE

Electrical Load (Tracker)

Through a single wire from the diode box to the ECM, ECM monitors electrical load caused by running lights, headlights, rear defogger (if equipped), warning unit and the heater and defogger fan. ECM will compensate for electrical load by increasing idle speed. ECM also compensates (increases) injector pulse width when electrical load causes battery voltage to drop.

Factory Service Tools

Use the Manual With the Right Hardware

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.