Only One Switch Operates Locks

1987 Pontiac Firebird Formula, 5.0 H, AutomaticSECTION Only One Switch Operates Locks

Check for loose wiring connections. Test Orange wire for power at switch. If there is no power, check for open in Orange wire. Test Blue wire at switch with switch in "LOCK" position. If there is no power, replace switch. If there is power, check for open circuit in Blue or Black wires.

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

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

Affiliate disclosure: We may earn a commission at no extra cost to you.

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.