This may help, it's a tool for figuring out why it won't start.
http://www.thesamba.com/vw/forum/viewtopic.php?t=349429&postdays=0&postorder=asc&start=0

Rob
vwrobb@gmail.com

On Thu, Sep 24, 2015 at 8:01 PM, Cary Chiang <ccchiang1@gmail.com> wrote:

> I'm trying to help a first-time vanagon owner get his van running.
> It's an '86, with 2.1L and manual trans.  I was told that the van was being
> driven almost daily, had some sort of alternator problem, and then failed
> to start one day.  A mechanic diagnosed that the spark plugs weren't
> firing, but a lack of money prevented any further work.  I noticed that the
> ignition switch was functioning poorly, and temporarily swapped in a good
> used one.  Next, I noticed that the fuel pump wasn't energizing when the
> ignition key was turned to the accessory position.  I ran power directly to
> the fuel pump to get it running, but the engine still won't start (I'm
> assuming because of no spark from the plugs).  I'm assuming that there
> is an electrical issue that is affecting both the fuel pump and the
> ignition system.
> I've cleaned up the two
> multi-pronged ground connections above the fuse block, and replaced the
> ECU, but am running out of easy ideas.  I plan to go back with a
> multi-meter, and check for voltage at the fuse block and at the terminal in
> the engine compartment black box.  Hopefully I will have access to a
> Bentley also, but my schematic-reading and Vanagon diagnosing skills are
> pretty rusty.  Any idieas and suggestions as to additional components,
> grounds, or
> voltages that I should check would be appreciated.  Thanks in advance!
>