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 MANUALSFORD1993E 350 VAN V8-7.3L DSLREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONPINPOINT TESTSFD - BRAKE ON/OFF (BOO) SWITCHFD - TESTING NOTES
1993 Ford E 350 Van V8-7.3L DSL
FD - Testing Notes
1993 Ford E 350 Van V8-7.3L DSLSECTION FD - Testing Notes
NOTE: You should enter this Pinpoint Test only when you have been directed here from Quick Test.
REMEMBER
This Pinpoint Test is intended to diagnose only the following:
- BOO circuit
- Processor assembly
DESCRIPTION
The Brake On/Off (BOO) input is wired to the stoplamp circuit and informs the processor when the brake is applied. The BOO input is used primarily by the converter clutch lock/unlock strategy.
REMEMBER
This Pinpoint Test is intended to diagnose only the following:
- BOO circuit
- Processor assembly
DESCRIPTION
The Brake On/Off (BOO) input is wired to the stoplamp circuit and informs the processor when the brake is applied. The BOO input is used primarily by the converter clutch lock/unlock strategy.
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.