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.
1995 Chevrolet S10/T10 P/U 4WD V6-262 4.3L VIN W CPIFACTORY OEM SERVICE PROCEDURE
Circuit Breakers
A Circuit Breaker is a protective device designed to open the circuit when a current load is in excess of rated breaker capacity. If there is a short of other type of overload condition in the circuit, the excessive current will open the circuit between the circuit breaker terminals.
Two types of Circuit Breakers are used. The first is identified simply as a Circuit Breaker. This type will open when excessive current passes through it for a period of time. It will close again after a few seconds. If the cause of the high current is still present, it will open again. It will continue to cycle open and closed until the condition causing the high current is removed.
The second type of Circuit Breaker is identified as a Positive Temperature Coefficient (PTC) Circuit Breaker. This type increases its resistance greatly when excessive current passes through it. The excessive current heats the PTC device. As the device heats, its resistance increases, thus the name, "Positive Temperature Coefficient." Eventually the resistance gets so high that the circuit is effectively open. Unlike the ordinary Circuit Breaker, the PTC unit will not reset until the circuit is opened, removing voltage from its terminals. Once voltage is removed, the Circuit Breaker will re-close within a second or two.
Two types of Circuit Breakers are used. The first is identified simply as a Circuit Breaker. This type will open when excessive current passes through it for a period of time. It will close again after a few seconds. If the cause of the high current is still present, it will open again. It will continue to cycle open and closed until the condition causing the high current is removed.
The second type of Circuit Breaker is identified as a Positive Temperature Coefficient (PTC) Circuit Breaker. This type increases its resistance greatly when excessive current passes through it. The excessive current heats the PTC device. As the device heats, its resistance increases, thus the name, "Positive Temperature Coefficient." Eventually the resistance gets so high that the circuit is effectively open. Unlike the ordinary Circuit Breaker, the PTC unit will not reset until the circuit is opened, removing voltage from its terminals. Once voltage is removed, the Circuit Breaker will re-close within a second or two.
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.
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