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.
Federal and High Altitude Man. Trans. Only
1983 Honda Prelude AutomaticSECTION Federal and High Altitude Man. Trans. Only
- Disconnect hose from vacuum switch B and connect hand vacuum pump to the hose. Apply vacuum to the switch. There should be voltage at control unit Green wire when less than 4 in. Hg vacuum is applied. If there is no voltage, replace vacuum switch and retest.
- Disconnect hose from vacuum switch A and connect hand vacuum pump to the hose. Apply vacuum to the switch. There should be voltage at control unit Blue/Black wire when less than 9.8 in. Hg vacuum is applied. If there is no voltage, replace vacuum switch and retest.
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.