ON MY 97 VW LOST TACH , OIL LIGHT STARTED TO FLASH
1997 Volkswagen Jetta
December, 17, 2011 AT 8:08 PM
Both issues appeared at the same time, I checked the oil pressure (at the head) at 35 lbs at 1000rpm. As it is a 1.9 IDI diesel, the tach is fed from an alternator signal at the w terminal. From others I hear that the tach and oil sending wiring may be connected.
do you have any suggestions that will narrow down the cause of the problem?