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.
1988 Ford Festiva L PlusFACTORY OEM SERVICE PROCEDURE
ECA 76 - No Code (Electrical Switch Inputs)
Check switch input voltages at ECA. If voltage readings are incorrect, check for opens, shorts or bad connections in wiring between switches and ECA. Repair as necessary. If all harnesses are okay, replace ECA.
ECA ELECTRICAL SWITCH VOLTAGE INPUTS
| Terminal | Condition | Voltage |
|---|---|---|
| 1I | Headlight Switch On | 12-14 |
| 1I | Headlight Switch Off | 0-2.5 |
| 1J | Rear Defrost Switch On | 12-14 |
| 1J | Rear Defrost Switch Off | 0-2.5 |
| 1K | Cooling Fan On | 12-14 |
| 1K | Cooling Fan Off | 0-2.5 |
| 1H | Blower Switch High | 0-2.5 |
| 1H | Blower Switch Off | 12-14 |
| 2B | Brake Light Switch On | 12-14 |
| 2B | Brake Light Switch Off | 0-2.5 |
| 3B | A/C Switch & Blower On | 10-14 |
| 3B | A/C Switch & Blower Off | 0-2.5 |
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.