1973 Lincoln Mark IV Automatic TransFACTORY OEM SERVICE PROCEDURE

Power Window Relay

On all models except Lincoln Continental (1970-71), the relay is located in the engine compartment, either on the firewall or the right hand wheel house. On Lincoln Continentals (1970-71) relay is located in the luggage compartment, mounted on the package tray. Test relay as follows:

  1. Connect one lead of a test lamp to ground. Connect the other lead to the output side of relay. Place the ignition switch in ON or ACC position and the bulb of the test lamp should light. If it does not, test continuity of wiring from ignition switch to actuating terminal of relay. Check voltage availability at input terminal of relay. If wiring and voltage OK, replace relay.
Factory Service Tools

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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.