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FD90 - Check For Proper Stoplamp Switch Installation



Continuous Memory Code 536 indicates a Brake On/Off (BOO) circuit failure. If the BOO input does not cycle after a predetermined number of transitions from 0 mph to a specific speed, the BOO input is assumed to be damaged and Continuous Memory Code 536 is set.

Possible causes:

- Stoplamp switch improperly installed.

- Open stoplamp/BOO circuit.

- Stoplamp/BOO circuit shorted to power.

- Damaged stoplamp switch.

- Damaged stoplamp ground connection.

- Check stoplamp switch for proper installation (alignment with pedal), corrosion, frayed wires, etc.

- Is stoplamp switch in good condition and properly installed?

Yes -- Go to FD91. FD91 - Check Stoplamp Ground

No -- Service as necessary. Clear continuous memory. Clearing Diagnostic Trouble Codes

Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)
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