Re: '81's electrical woes...annoying its owner

[Feenix <feenix@javanet.com>]

Dave Novak wrote:
> 
> >     Hmmm, only 2 wires that go back there, 1 for light switch, and one
> >for the cluster.  Not sure what would happen if that wire was off, but
> >you could simply take out the cluster and then make sure that the wire
> >plug is securely on there.  I am still clueless as to what the problem
> >is.  What works when and what.  Is it just car starting problems?  Does
> >all the other electrical shit work fine?
> 
> Ok. It all began back this past spring. The 1.7fi that was in there wouldn't
> start very well. I'd turn the key, it would catch.. but only if my foot was
> on the gas. As soon as I took my foot off the gas, a relay would click and
> the engine would die rather quickly. This continued for a few days, leaving
> me unable to drive the car. Then, one morning, I went outside to try and
> start it, and it would just crank. I was getting no spark. I would get 12+
> at the coil, but no spark from it.
> 
> I just decided to leave that be as I found myself the new owner of a Jetta
> GLI 16v. Over the next few months, the engine would be removed from the
> scirocco, and the engine from the Jetta would take it's place.
> 
> The '81 scirocco now sits there with a 1.8l 16v (PL) engine with matching
> computers, etc etc etc.. hooked up correctly per my Bentleys and Brian
> Honnold.
> 
> So, what happens when I come to that final moment.. the moment of truth when
> the car either dies, or starts right up? Nothing. It never catches. It
> cranks just fine, but never catches.
> 
> I check for spark... no spark. Same symptoms as the long gone 1.7l 8v
> engine.
> 
> THEN, something else happens with the car's electrical system. I'm poking
> around the floor area by the driver's feet one day, trying to put in an
> under dash shelf. As I push it in.. "click click". Pushing a wire or group
> of wires down there seems to turn everything off.
> 
> Normally, when the key is off, the parking lights, emergency flashers,
> cigarette lighter, etc works. Normally, when the key switch is turned on,
> the fuel pump primes, computers turn on (idle stabilizer works), I can use
> the blinkers, headlights, windshield wiper, etc. Standard scirocco type
> stuff.
> 
> As I poked around under the dash, nudging wires and harnesses seeing which
> one made this evil situation, I get a "click click" from a certain loom of
> wires. If you're upside down (head where feet should be, looking up a the
> dashboard), there's a group of wires to the right (your right) of the
> steering column just behind the dash -- The loom that goes to the instrument
> cluster, emergency flashers switch, and rear defogger switch. To that loom,
> is taped the wires that go to the ignition switch. The other end of these
> groups of wires is the fuse box (where things are naturally horiffic, as
> they all are in the '81-'82 model years).
> 
> Well, I push on said loom right next to the steering column and it's as if
> the ignition key doesn't work at all. All swiched acccessories (blinkers,
> wipers), and the computer and fuel pump relays (basically, all the shit that
> usually works when the key is on) don't work.
> 
> So, I'm here pushing and letting go of this wire loom watching everything
> turn on, then off, then on, then off again. Trying to narrow down where the
> breakage could be.
> 
> Here's a somewhat interesting part. Remember I couldn't get spark for the
> life of me? If I pushed the wire loom to make everything turn off, as I
> turned it on, I believe a spark would occur. I can guess this to be correct
> cause as I was playing with the bitchy wires... let's say I did this: With
> the ignition system seeming to act normal, I'd try and start the car. It
> would crank. After letting go with the car still not started, I'd play with
> the wire loom, turning everything off and on again. As everything turned
> back on, I'd get a kick from the engine. Like a little jolt. I assume it was
> combustion occuring in the cylinder, because nothing else could make the
> engine spontaneously move like that. Sometimes I heard a pop, as if a spark
> occured.
> 
> >    Hmmm, unfortunatly I dont know much about that as my book doesnt get
> >into that stuff.  Do you have a voltmeter?  You can check to see if that
> >stuff gets power when the ignition is on.
> 
> Can I scan the diagrams from an '81 Jetta and send them to you?
> 
> This whole deal pisses me off.
> 
> I appreciate the help more than you know.
> 
> 

I feel for you dude. Don't know what to say. Have you tried to start the
car from inside the engine bay? Try "jumping the starter". Not exactly
sure how to do it but if you can get voltage to it, the motor should
crank, right? Also it could be the fuse box instead of the wireing. Buy
one of those hundred dollar replacements I've seen in the Parts Place
catalog. Otherwise I don't know. 

Feenix...
80 1.8 (mostly re-wired and relayed)

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