[Vwdiesel] Arrggggh

[Erik Lane]

I would agree that it sounds like a grounding issue. It kind of sounds like
the block might not be solidly grounded to the frame. I'm not sure that
really makes much sense, though. If I were working on it I would be looking
at the main ground points and cleaning them up. (Like where the ground wire
for the battery connects to the block - stuff of that magnitude.)

When trying to pull many amps, like running the plugs or cranking the
starter, maybe the block itself is floating somewhere above true battery
ground, due to a dirty connection.

I don't know what the odds are of this being correct, but it seems the most
likely to me, and it's where I would start.

Good luck!
Erik

On Thu, Jan 14, 2016 at 9:04 AM, KI4TLF <ki4tlf at gmail.com> wrote:

> I didn't have the diagram for it, but I'm looking around.
>
> It sounds like it's a grounding issue or at least a marginal connection
> somewhere.  Temperature changes cause the connection to vary and the light
> responds.
>
> GregM
>
> -----Original Message-----
> From: Vwdiesel [mailto:vwdiesel-bounces at vwfans.com] On Behalf Of
> lbaird119 at aol.com
> Sent: Wednesday, January 13, 2016 10:38 PM
> To: vwdiesel at vwfans.com
> Subject: Re: [Vwdiesel] Arrggggh
>
> '96, 1Z, TDI Wagon.
>   So far my guess is feedback through something else on the ground
> circuit.  Picked up a copy of the relevant circuit tracks today.  Hope to
> have time to look them over and figure out what I need to track down and
> test.  Seems to be getting + on that ground track, best I can guess so far.
>
>
> Tractor blade had no float today (we have a ball valve to shut off the
> down pressure).  Something was wrong, making a check valve somehow.  One of
> the seals had a piece missing.  Picked up a 3/4 valve, as Dad mentioned and
> it looked like one.  Got back and nope, 1/2" so go back to town after one.
> Supplier was out so to Lowe's I go.  Figured out why it looked like a 3/4
> valve;  HD 1/2" so much bigger body, just didn't pay attention to the pipe
> size.
>   Nothing's going quickly.  454 has had an oil leak so rather than just
> replace the seal we're pulling it and doing the crank.  When I first
> installed it, I didn't get the torque converter all the way in and had all
> that pressure on the crank and ground down the thrust.  Figured if we're
> that close, we'd better fix it right this time.  Ugh.  Thank goodness Jose
> is helping out and doing most of it.
>      Loren
>
>
>
>
> -----Original Message-----
> From: KI4TLF <ki4tlf at gmail.com>
> To: lbaird119 <lbaird119 at aol.com>
> Sent: Wed, Jan 13, 2016 6:30 pm
> Subject: RE: [Vwdiesel] Arrggggh
>
> What year Loren?
>
> GregM
>
> -----Original Message-----
> From: Vwdiesel [mailto:vwdiesel-bounces at vwfans.com] On Behalf Of
> lbaird119 at aol.com
> Sent: Tuesday, January 12, 2016 7:58 PM
> To: vwdiesel at vwfans.com
> Subject: [Vwdiesel] Arrggggh
>
>
> Geez!  Took me a week to do the starter on the crawler, what with holiday,
> parts, no-show on parts...
>   Now I'm trying to get the Passat going again.  It had been starting hard
> (figured it was low battery from short-tripping) then it wouldn't start so
> ok, bad 103/GP relay.  Sure enough it wasn't working.  Also the day before,
> it was going along, sputtered badly, CEL came on, slowly started clearing
> up and in a minute or two was running fine again.  Hmmm.
>   After diagnosis, the relay was fine but not getting a ground.  OK,
> unplug the temp sensor and all is well.  Order a new temp sensor, put it in
> and it does the same thing!  Only fault was open or shorted to + for the
> temp sensor, same as it shows with it unplugged.  So now I'm not sure where
> to look.  I thought the supply of ground was bad but if it's broken then
> it'd be the same as unplugging, which gives me full glow time, as it
> should.  I suppose if somehow it's shorted to positive...
>
>   I'm not sure which wire or where to start looking.  :-P  Apparently the
> one from the sensor to the ECU is ok so that much is good and the ECU
> should be since it at least goes full glow or no glow and recognizes a
> problem.
>
>   Any ideas or at least wiring diagrams of where to look?
>   TIA.
>     Loren
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