When the car is at a low speed-ideling..the oil light comes on-the car has oil in it.
SOURCE: Instrument cluster wiring 1989-1990 vw cabriolet
Not sure what the other wires go to, maybe the air bag, regardless all instruments are working on the '89.
SOURCE: Oil Light comes on VW passat
It sound as it your oil pressure senser or the oil pump needs replacing.
SOURCE: what is the correct oil pressure on a 1988 vw cabriolet
a plunged oil filter will do this so will a bad oil reg.
try changing your oil and get a new filter
also you may have had the incorrect filter on it "some shops do this"
SOURCE: 89 vw cabriolet oil light comes on....
i put 20w-50 peenzoil in my cabby and helped a lot. every so often it might do it. but i did just find a vacuum leak that goes from the intake tube to the valve cover. i think if i fix that, it should be solved fully.
SOURCE: 1989 vw cabriolet fuel pump test is there a way
yes. Depending on where your fuel filter is located, you can disconnect the fuel line at the fuel filter and then try to crank the car over. If it spits fuel out of the disconnected line your pump is working, if not then it's bad. Another way to tell, but not always is when you car is started you hear a high pitched whining sound from the tanks. This is usually (again, not always) an indication of a fuel pump about to fail.
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/matthew_d24b835e574ef6ca
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