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 MANUALSGMC1991FORWARD CONTROL 3.9 L, SM465/M20REPAIR AND DIAGNOSISELECTRICALSTARTERSTARTING SYSTEMSOLENOID WINDING ON-VEHICLE TESTINGHOLD-IN WINDINGSNOTES
1991 GMC Forward Control 3.9 L, SM465/M20
Hold-In Windings: Notes
1991 GMC Forward Control 3.9 L, SM465/M20SECTION Notes
- Connect an ammeter, voltmeter, carbon pile and battery into starter circuit. See Fig 1. Using carbon pile, decrease battery voltage to 10 volts.
- Refer to SOLENOID HOLD-IN WINDING SPECIFICATIONS TABLE for correct amperage reading. A higher reading indicates windings are shorted or grounded; a lower reading indicates excessive resistance.
SOLENOID HOLD-IN WINDING SPECIFICATIONS
| Part No. | Amps | Volts |
|---|---|---|
| 1114520 | 13-19 | 10 |
| 1114530 | 13-19 | 10 |
| 1114563 | 14-18 | 10 |
| 10469039 | 13-15 | 10 |
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.