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How to Clean Corroded Automotive Wiring Harness Connectors?

2 Answers

DominicDella

07/28/25 8:28pm

Effective, but prone to scratching the connectors. Please use with caution for expensive earphone connectors. After wiping for 5 minutes, the oxidation on the connector will come off, but some scratch marks may also appear on the connector. However, be careful when using it, as oxalic acid is highly corrosive to stainless steel. High-concentration oxalic acid can also easily corrode fingers. It can also solve the problem, but for gold-plated connectors, use with caution as the gold plating is thin.

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VanSamuel

08/12/25 1:15am

Dealing with corroded automotive wiring harness connectors requires caution. I've encountered this often during car repairs. First, disconnect the negative battery terminal to ensure no current flow - safety comes first. Then remove the connector, spray electronic cleaner on the corroded areas, and wait a minute to let it loosen the rust. Use a small soft-bristled brush to gently remove debris (hard bristles might scratch the pins). After cleaning, dry thoroughly with compressed air or let it air-dry for several hours. Once completely dry, apply anti-corrosion spray to prevent future rusting. For severe corrosion (like bent/broken pins), simply replace the connector - they're inexpensive and provide a permanent solution. Remember to check nearby wiring for aging, and add waterproof tape in humid environments to prevent future failures. Don't reconnect the battery immediately - test the connection first to avoid short circuits blowing fuses.

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