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Gran's '57

This is a discussion on Gran's '57 within the Early Birds [1955-1957] forums, part of the Thunderbird Model Years category; Don't despair on electrical problems. These systems are so simple that you can troubleshoot and fix one item at a ...

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  #16 (permalink)   IP: 12.163.14.146
Old 01-16-2020, 02:08 PM
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Don't despair on electrical problems. These systems are so simple that you can troubleshoot and fix one item at a time, and it will be reliable. That's one of the good things about older cars: They can be fixed by humans. :)
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Old 01-20-2020, 09:22 AM
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Originally Posted by granzbird View Post
Long story: car's been plagued with electrical issues forever. Therefore she mostly sits parked. ...
Most electrical problems can be traced back to corroded connections: grounds and at the fuse panel.

Grounding is easy to check using an ohm meter. You should have zero ohms between the battery negative and the bare connector. If not, remove the connector, grind a new surface on the base metal, clean or replace the connector and screw, and use a new washer. If the ground is on sheet metal, you may have to drill the hole larger and use the next size screw. The best connection is new threads cutting into the metal.

Same deal with the fuse panel- use an ohm meter across the fuse contacts to test. These are typically tin plated so develop a white residue corrosion. Most of the time a gentle cleaning is all that is necessary. Buy a can of electrical contact cleaner and scrub away with an old toothbrush or Q-tips. Don't use a pencil eraser or any abrasive.
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