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.
1960 Chevrolet Nomad 5.7L Eng, Automatic Trans, Trans Mfr CD PowerglideFACTORY OEM SERVICE PROCEDURE
Alternators And Generators
NOTE:
If components have been added that increase vehicle electrical load requirement ( for example, sound systems, air conditioning, alarm systems, etc.), charging system output must meet the increased demand.
| Condition | Code | Procedure |
|---|---|---|
| Alternator output meets OEM specification but is insufficient for add on electrical load | 2 | Suggest upgrade of alternator or removal of excess electrical load |
| Alternator's rated output is below OEM specification | B | Require replacement |
| Attaching hardware broken | A | Require repair or replacement of hardware |
| Attaching hardware missing | C | Require replacement of hardware |
| Attaching hardware non-functioning | A | Require repair or replacement of hardware |
| Connector (Weatherpack type) leaking | A | Require repair or replacement |
| Connector broken | A | Require repair or replacement |
| Connector melted | A | Require repair or replacement |
|
NOTE:
Determine cause and correct prior to repair or replacement of part.
|
||
| Connector missing | C | Require replacement |
| Diode inoperative | A | Require repair or replacement |
|
NOTE:
Inoperative includes intermittent operation.
|
||
| Housing broken, affecting performance | A | Require repair or replacement |
| Housing broken, not affecting performance | No service suggested or required | |
| Housing cracked, affecting performance | A | Require repair or replacement |
| Housing cracked, not affecting performance | 1 | Suggest repair or replacement |
| Inoperative | A | Require repair or replacement |
|
NOTE:
Inoperative includes intermittent operation.
|
||
| Noisy | 2 | Suggest repair or replacement |
| Pulley incorrect | B | Require replacement |
| Terminal broken | A | Require repair or replacement |
| Terminal burned, affecting performance | A | Require repair or replacement |
|
NOTE:
Determine cause and correct prior to repair or replacement of part.
|
||
| Terminal burned, not affecting performance | 2 | Suggest repair or replacement |
| Terminal corroded, affecting performance | A | Require repair or replacement |
| Terminal corroded, not affecting performance | 2 | Suggest repair or replacement |
| Terminal loose, affecting performance | B | Require repair or replacement |
| Terminal loose, not affecting performance | 1 | Suggest repair or replacement |
| Terminal resistance (voltage drop) out of specification | A | Require repair or replacement |
| Threads damaged | A | Require repair or replacement |
| Threads stripped (threads missing) | A | Require replacement |
| Voltage drop out of specification | A | Require repair or replacement |
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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