Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSFORD1987THUNDERBIRD BASE, 3.8 3REPAIR AND DIAGNOSISBRAKESTRACTION CONTROLANTI-LOCKPINPOINT TESTSTEST A (ABS WARNING LIGHT ON WITH BRAKE WARNING LIGHT OFF)TEST A2A (MAIN POWER RELAY SECONDARY CIRCUIT)

1987 Ford Thunderbird Base, 3.8 3

Test A2a (Main Power Relay Secondary Circuit)

1987 Ford Thunderbird Base, 3.8 3SECTION Test A2a (Main Power Relay Secondary Circuit)

Disconnect main relay from socket. Check for continuity between main power relay socket pins No. 3 and No. 5. See Figure or Figure .
It continuity present, go to TEST A2b . If no continuity present, replace main power relay.

RENDER: 1.0x

NO RELATED

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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.