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.
1968 Chevrolet Biscayne 5.3L Eng, Automatic Trans, Trans Mfr CD PowerglideFACTORY OEM SERVICE PROCEDURE
Units With Field Relays
- If indicator lamp is inoperative, connect jumper wire from regulator terminal No. 4 to ground. Turn ignition ON for no longer than 10 seconds. If indicator lamp lights, remove jumper wire and connect it from regulator terminal "F" to terminal No. 4. If indicator lamp lights, regulator circuit is open and the unit must be replaced.
- To test regulator, connect a jumper wire from No. 3 terminal to No. 2 terminal. Engine must be OFF. Do not leave jumper wire in this position longer than 5 minutes. Proceed as for testing regulators without field relay.
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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