Thanks Scott.

For sure am putting ECM under rear seat. Already have a hole leftover
from the gas heater for wires to run through.

I didn't know Vanagon (post '86) had *heated* O2 sensors.

I guess I could run wires forward for relays, but they should be fine
in the engine bay. If I had any doubts about crap getting in the relay
box, I sure wouldn't put them there! --- :^)

Neil.

On Tue, Apr 8, 2008 at 1:34 PM, Scott Daniel - Shazam
<scottdaniel@turbovans.com> wrote:
> Ok, that makes sense.
>  In 86 and up vanagons )2 heat is supplied by the same relay that powers up
>  the ECU I believe. Easy to check on a Bentley diagram.
>  But having a separate relay for that function is fine.
>
>  I have the biggest firmest rule in the world about not letting ANYTHING go
>  until the new engine conversion is perfectly working and all sorted out,
>  like a few months worth.
>  I use many of the stock waterboxcer parts on Subaru conversions, engine
>  upgrades from 1.9 to 2.1 etc.
>  Sometimes I get 6 to 8 parts reused in the new engine conversion.
>
>  Sure, you can stuff your relays in the black junction box.
>
>  I also........in Subaru conversions, I put the two relays under the back
>  seat next to the ECU.  That works quite nicely. Keeps the engine compartment
>  clean looking, and puts the relays where no road junk or moisture can get to
>  them. I wouldn't consider putting the ECU anywhere other than under the rear
>  seat btw.
>  Scott
>
>
>  -----Original Message-----
>  From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
>  neil N
>
> Sent: Tuesday, April 08, 2008 1:03 PM
>  To: vanagon@GERRY.VANAGON.COM
>
>
> Subject: Re: 4 pin fuel pump relay(s) question.
>
>  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.
>