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 MANUALSCHEVROLET1983BLAZER FULL SIZE V8-379 6.2L DSLREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTGLOW PLUG SYSTEMTESTING AND INSPECTIONTHERMAL CONTROLLER CHECK
1983 Chevrolet Blazer Full Size V8-379 6.2L DSL
Thermal Controller Check
1983 Chevrolet Blazer Full Size V8-379 6.2L DSLSECTION Thermal Controller Check
1982---84
1. Disconnect electrical connector from thermal controller.
2. Measure resistance between controller terminals using high impedance, digital ohmmeter set on 200 ohms scale.
3. Resistance should be as follows:
Pins 2 to 3 ................0.40---0.75 ohms
Pins 4 to 5 ....................24---30 ohms
Pins 1 to 5 ..................117---143 ohms
Pins 2 to 6 .............Continuity (0) ohms
4. If resistance values are not as specified, controller is defective.
5. If resistance values are within specifications, reconnect electrical connector and observe controller operation with ignition key in on position and engine stopped.
6. If controller cycles more than one time, controller is satisfactory.
7. If controller cycles only once, check for a short or open in harness as outlined in ``System Diagnosis.''
8. If all other components are satisfactory, but controller cycles only once in step 5, replace controller and recheck system operation.
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.