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.
1978 Toyota Pickup Base, Automatic TransFACTORY OEM SERVICE PROCEDURE
IGNITOR Test
- Turn ignition on. Connect voltmeter positive probe to ignition coil positive terminal, and negative probe to coil negative terminal. Reading should be approximately 6 volts.NOTE: On some Toyota models, step 1) is replaced by a voltage check between ignition coil negative terminal "e" and resistor terminal "a". This reading should be 12 volts. Either check Is acceptable.
- Unplug wiring connector from distributor. Using a 1.5 volt dry cell battery, connect positive battery pole to White wire of 2-pin connector. Connect battery negative pole to Pink wire terminal. See Fig 1.
- Again check oil voltage with the 1.5 volt battery installed. Voltage should be approximately zero (0) volts. Turn ignition off, remove test equipment, and reconnect wiring.
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.