Hi Scott.

3rd relay is for the HO2S (heated O2 sensor)

The Jetta uses a fancy schmansy O2 sensor with a heater element.

Thanks for the confirmation and tips.

Unfortunately I didn't keep the "high voltage" box from donor. Sold it
with engine. Luckily I had the sense to keep the black junction box
from WBX donor. It looks like it seals properly. Should suffice for
relays.

Neil.

On Tue, Apr 8, 2008 at 12:47 PM, Scott Daniel - Shazam
<scottdaniel@turbovans.com> wrote:
> For sure you want a relay that can handle the load.
>  Since you are using a Vanagon FP, I'd just use a vanagon FP relay - then I'd
>  know it was sufficient.
>
>  How is it you need 3 relays total ?
>  I figure one for powering up the ECU, one for FP.
>  That's how all waterboxer vanagons are - what would jetta have that's extra
>  ?
>
>  I for sure wouldn't' use anything from an air-cooled vanagon,
>  I'd get the box with two relays in it, mounted above the coil, on any 83 and
>  up waterboxer vanagon.
>  Not wanting to deal with small parts sales right now, but I got 'em.
>  Very easy to get, from any waterboxer vanagon.
>  Scott
>  www.turbovans.com
>
>
>
>  -----Original Message-----
>  From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
>  neil N
>  Sent: Tuesday, April 08, 2008 12:16 PM
>  To: vanagon@GERRY.VANAGON.COM
>  Subject: 4 pin fuel pump relay(s) question.
>
>  Hi all.
>
>  This is for my Jetta engine into Vanagon conversion, but I am using
>  the Vanagon FP.
>
>  My thought:
>
>  use '85 Vanagon relay block to mount relays needed for my
>  Jetta/Vanagon conversion. 2 of 3 needed fit, but Jetta FP relay does
>  not.
>
>  Jetta fuel pump relay has pins set up differently. 2 spades are
>  larger, one smaller. All in a different arrangement.
>
>  I have another VW relay with 4 pins. Compared to the Jetta relay, they
>  both have the same pin numbers and schematic label on them. No amp
>  rating, but they look like they do the same thing.
>
>  If the amperage rating is the same, could I swap in the other VW relay
>  or use a FLAPS type relay?
>
>  Pretty sure it would work safely, but just checking in with the more
>  knowedgable electrical minds.
>
>  Thanks!
>
>  Neil.
>
>