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 MANUALSDODGE AND RAM1996CARAVAN V6-229 3.8LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSBODY CONTROL MODULEDESCRIPTION AND OPERATIONPOSITIVE TEMPERATURE COEFFICIENT (PTC)
1996 Dodge and Ram Caravan V6-229 3.8L
Positive Temperature Coefficient (PTC)
1996 Dodge and Ram Caravan V6-229 3.8LSECTION Positive Temperature Coefficient (PTC)
The wiring to several electrical systems on this vehicle will be protected using PTC (Positive Temperature Coefficient) devices.
The PTCs are located in the junction block and act as non-replaceable resettable fuses.
An overload such as a short circuit will cause the device to trip and limit the current to less than an amp, protecting the wire.
To reset the device all current must be removed (similar to a remote reset circuit breaker).
- With current removed the PTC will automatically reset in about 20 seconds.
The PTCs are located in the junction block and act as non-replaceable resettable fuses.
An overload such as a short circuit will cause the device to trip and limit the current to less than an amp, protecting the wire.
To reset the device all current must be removed (similar to a remote reset circuit breaker).
- With current removed the PTC will automatically reset in about 20 seconds.
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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.