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 MANUALSBUICK1987REGAL GRAND NATIONALREPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSA/C-HEATER SYSTEM - AUTOMATICPROGRAMMER INDEXINGNOTES
1987 Buick Regal Grand National
Programmer Indexing: Notes
1987 Buick Regal Grand NationalSECTION Notes
PROGRAMMER ELECTRICAL INDEXING
| Application | Programmer | |
|---|---|---|
| Regal | ||
| Heater Control Valve | A | |
| A/C | B | |
| Defroster | C | |
| Heater | D | |
| Recirc. | E | |
| Ignition | F | |
| Skyhawk | ||
| Open | A | |
| Recirc. | B | |
| Defroster | C | |
| A/C | D | |
| Heater | E | |
| Ignition | F | |
- Check voltage at appropriate pin in 22-pin control panel connector. If voltage is less than 2 volts, check electrical connections and wiring between control panel and programmer. If voltage is more than 2 volts, replace control panel.
- Check voltage at appropriate pin in 22-pin control panel connector. If voltage is more than 2 volts, check electrical connections between control panel and programmer. If less than 2 volts, replace control panel.
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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.