At 06:00 PM 2/6/2013, neil n wrote:
>The Jetta fuel pump relay is for sure energized by a supplied negative
>from the ECU. Oddly, the Bentley diagram for the power supply relay
>shows 30 going to 85 but the fuel pump relay shows 30 going to 86.

That's the socket, not the relay.  They needed a ground-driven socket
but only had a positive-driven one so they cheated with the pin designations.

>If the OEM fuel pump and power supply relays each use a diode as a
>suppression device, I have to wonder about the polarity of this
>component in each relay given the differences as shown in the Bentley
>diagrams.

Turns out not to be a diode (and I should have believe in the German
resistor symbol, the plain box, instead of taking it for "something
here").  But see above.

Yrs,
d