An accumulation of dust inside the body of the turn signal switch can cause a partially closed circuit, which results in the turn signal relay intermittently clicking at a high rate. Spraying a small amount of residue-free electronic contact cleaner (such as Electrosolve) inside the turn signal switch can resolve this problem. The turn signal relay is not the root cause of this problem, but may be damaged by it.
1998 Volkswagen Jetta Problem Reports
Newest 1998 Volkswagen Jetta Problem Reports
Heater core leaks are common in this model, more so if the wrong anti-freeze/coolant is used in the cooling system.
Fan assembly replaced. Dealer said there was a short in the electronics which led to fan not turning off after car was shut off.
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.
A coolant leak may develop after oil filter replacement. The coolant o-ring seal can be damaged if the oil filter housing turns when removing or installing the oil filter. The recommended procedure is to hold the filter housing when tightening or loosening the oil filter.
Throttle body failure is not uncommon and can lead to shifting issues with the automatic transmission and other drivability concerns.
An ignition coil or spark plug may fail unexpectedly resulting in an engine misfire and possible illumination of the Check Engine Light. Vehicles equipped with spark plug wires may also develop a misfire caused by a failed spark plug wire.
Reverse gear failures and noise in the manual transmission models are common.
One or more power windows may fail. Our technicians tell us this is commonly due to a failed window regulator which will require replacement.
Shifting issues due to internal problems in high mileage automatic transmissions can be difficult to resolve without transmission replacement.