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.
Circuit 4/43
1993 Saturn SC L4-1.9L SOHC VIN 9SECTION Circuit 4/43
CIRCUIT 4/43
Function:
This circuit supplies battery voltage to the IGN4 input of the radio. The radio can be turned ON when this input receives voltage.
CIRCUIT 4
Location:
Connects ignition switch connector cavity B to I/P junction block connector cavity C8.
Type:
Brown 14 gage wire
Repair:
Check for OPENS/SHORTS.
Repair as needed.
If this component is good, go to the next item indicated on the Symptom Chart.
CIRCUIT 43
Location:
Connects I/P junction block connector cavity C5 to radio connector cavity 9.
Type:
Yellow 22 gage wire
Repair:
Check for OPENS/SHORTS.
Repair as needed.
If this component is good, go to the next item indicated on the Symptom Chart.
Function:
This circuit supplies battery voltage to the IGN4 input of the radio. The radio can be turned ON when this input receives voltage.
CIRCUIT 4
Location:
Connects ignition switch connector cavity B to I/P junction block connector cavity C8.
Type:
Brown 14 gage wire
Repair:
Check for OPENS/SHORTS.
Repair as needed.
If this component is good, go to the next item indicated on the Symptom Chart.
CIRCUIT 43
Location:
Connects I/P junction block connector cavity C5 to radio connector cavity 9.
Type:
Yellow 22 gage wire
Repair:
Check for OPENS/SHORTS.
Repair as needed.
If this component is good, go to the next item indicated on the Symptom Chart.
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.