The 150 ohm resistor is the biggest component of all those ones that are
lined up together in the center section of the blue foil. It is in a
small gap in the foil so it's heat won't cook the plastic foil. Your
year has a diode in the circuit that prevents you from simply measuring
ohms between those 2 pins on the 14 pin connector. Instead you need to
measure from pin 8 and from one leg of the diode, the leg closest to the
tach. The diode is the one right next to the 150 ohm resistor.

Mark

Shawn Wright wrote:
> Hi,
>
> I have two big 120ohm resistors, and a 470ohm in series with the LED. All
> three check out ok, yet the resistance between terminal 8&  11 is 540ohms,
> not the 160 it should be. Or is that also an old spec in Bentley?
>
> Thanks
>