Hi Steve.

P. 97.122 shows a small gauge grey/black wire from ign. sw. Su to the
seat belt warning relay. AFAIK, Su is activated when key is inserted.

FWIW, my '88 has a 4 pin ECU relay so I generally use the '87 wiring
diagrams for reference. In this case though, it appears that the above
grey/black wire is the same.

If it were me I'd trace that wire back from the ign. switch connector.
See where it terminates. As for fuel pump power, have you tried
bypassing the fuel pump relay (as per Bentley test) to see if you then
get 12V + at the fuel pump connections?  Am thinking that if there
might bypass any alarm or disabling system and obviously mock-up
things as if engine was running.

Neil.

On 12/3/13, Steve Cotsford <cotsford@aol.com> wrote:

> Hi,   I bought this '88 model Vanagon back in April.

> I have a fuel pump to install.    I do however have a mysterious (to me
> anyway) electrical issue.     If I insert the ignition key, all the turn
> signals and dash lights start flashing and so far I have not found a way to
> stop this.  All the dash switches are in the off position.  Clearly there is
> a security system that I am ignorant of and I am not going to make any
> progress until I have the upper hand in this.    The electrical system seems
> to be fine otherwise although I have not succeeded in getting power to the
> fuel pump connections.  Probably because a system is making the turn signals
> and dash lights flash.    All the lights work properly otherwise.  The
> wipers work although there is a missing relay and it only works on full
> speed and will not park properly.
> I am a retired mechanical engineer and have rebuilt several engines, gas and
> diesel, converted cars, drive VW tdi cars and a Land Rover converted to
> 300tdi, possess a Fluke meter and I am not usually a rookie.    However if
> someone could point me in the right direction to get started on this one, I
> would be very appreciative.    Many thanks,  Steve

--
Neil n

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