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The switch underneath the coolant reservoir may have gone bad overtime. It is simple to replace.

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Q: What might prevent the fan on a 1990 Jetta from turning off?
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Neville Jetta was born on 1990-02-12.


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Depends on mileage and condition.


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To replace the 1990 VW Jetta water pump you need to have a new one. By using the tools in the tool box, carefully open the old water pump and replace it with a new one.


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Why dont your blinkers work in your 1990 jetta you changed the flasher and the fuses are not broken The hazards work but turn signals wont?

The 1990 VW Jetta turn signals will not work when the ground wire is broken or corroded. The turn signals may need the lightbulb's replaced.


How do the relays go into the fuse box in a 1990 Volkswagen Jetta?

2nd on top row from left side


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Go to the library and get the manual; locate the appropriate instruction and follow it.


Can you substitute ATF for steering fluid in 1990 VW Jetta?

Only if VW recommends it. Use exactly what VW recommends.