1990 Ford Thunderbird BaseFACTORY OEM SERVICE PROCEDURE

Circuit Protection Devices

CIRCUIT PROTECTION DEVICES LOCATION

Component Location
Anti-Theft In-Line Fuses In wiring harness, at left rear of luggage compartment.
Circuit Breakers
Cigar Lighter & Dimmer Switch In cavity No. 3 of interior fuse block.
Fuel Filler Door, Power Door Locks & Power Seats In cavity No. 2 of interior fuse block.
Luggage Compartment Lid, Moon Roof & Power Windows In cavity No. 1 of interior fuse block.
Windshield Wipers In cavity No. 4 of interior fuse block.
Fuse Blocks
Non-Supercharged On left front fender panel, behind battery. See Figure .
Supercharged On left front fender panel, behind battery. See Figure .
Interior Behind lower left side of dash. See Figure .
Fusible Links
Charging System (Dk. Green) A Near starter relay.
Charging System (Dk. Blue) C Near starter relay.
Cooling Fan Motor (Black) B Near starter relay.
Secondary Junction Block (T-Bird) Behind right side of dash, right of steering column.
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:

  • • 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.