Electrical issues that are difficult to diagnose—and sometimes intermittent—are typically due to ground wiring issues. The most troublesome ground locations are under the battery or at the engine.
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Newest reported 1990 Volkswagen Cabriolet problems
Ignition wire breakdown is common, resulting in misfires.
Reverse gear failures and noise in the manual transmission models are common.
Shifting issues due to internal problems in high mileage automatic transmissions can be difficult to resolve without transmission replacement.
during heavy rain storms the passenger side floor gets soaked with water. I have removed the interior carpeting and the insulation behind it is wet also, so I suspect the windshield seals. Can you direct me as to how to replace them?