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 RAM1977PICKUP D300, 4D PICKUP, 3.7L ENG VIN B, AUTOMATIC TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROL SYSTEMSELECTRIC ASSIST CHOKETESTINGCHOKE HEATING ELEMENT TEST
1977 Dodge and Ram Pickup D300, 4D Pickup, 3.7L Eng VIN B, Automatic Trans
Choke Heating Element Test
1977 Dodge and Ram Pickup D300, 4D Pickup, 3.7L Eng VIN B, Automatic TransSECTION Choke Heating Element Test
- Disconnect only the B+ wire at the control switch. Connect an ohmmeter lead to the choke housing or choke retainer screw.
- Touch other ohmmeter lead to a bare portion of choke wire connector at switch (not B+ terminal). An ohmmeter reading of 4-12 ohms indicates heater is okay. If ohmmeter indicates an open or short circuit, replace choke assembly.NOTE: Heater element must not be immersed in any fluid, as an electrical short to choke heater is also a short circuit to ignition system.
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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.