2005 Mercury Mariner 3.0 1, FWDFACTORY OEM SERVICE PROCEDURE

Powertrain Control Module (PCM) Connector

For PCM connector views or reference values, refer to REFERENCE VALUES - GASOLINE MODELS .

Vehicle Connector Circuit Pin
E-Series 170 Pin VPWR B35
PWRGND B47
4x4L B33
F-150 190 Pin VPWR B51
PWRGND B67
4x4L T8
All other vehicles 104 Pin VPWR 71
PWRGND 103
4x4L 14
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.

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