Yes,the ECU switches on a ground for the fuel pump relay whenever it thinks
the pump should run.

The ECU also switches on a ground for the ignition coil whenever it thinks
it is time for a spark.

The ECU won't do these things if it isn't powered up.

Check the red wires I mentioned previously. This red wire path brings main
battery power to the ECU. I have fixed it or helped fix it on many
83,84,85,86,87,88,89,90,91 Vanagons.

Other things could be the cause, such as the ECU, but check the power path.

I am typing on a phone, sitting in a campground in France. I can only be of
so much help.

Mark
On Jul 11, 2016 8:40 AM, "Fuzzy :philippe" <fuzzmeister@gmail.com> wrote:

> Thanks Mark.
>
> When I turn on the ignition switch, the left (power) relay does click on,
> but not the right (fuel) one. And the fuel pump does not come on for a
> second. How do you suggest I test this? Is the ECU responsible for causing
> the fuel relay to click on? How do I test whether the ECU is getting power?
>
> Much appreciate the help!
>
>
>
> A bientot et avec amour,
>
> :Philippe
>
> Love Coach ~ Event Producer ~ Certified Sexological Bodyworker
> Philippe Lewis ~ fuzzmeister@gmail.com ~ 415-505-0786
> www.Exquisite.Love ~ www.ClubExoticaPresents.com
> www.facebook.com/fuzzyp ~ www.facebook.com/philippesimonlewis
>
> “Come to the edge.' 'We can't. We're afraid.'
> 'Come to the edge.' 'We can't. We will fall!'
> 'Come to the edge.' And they came. And he pushed them. And they flew."
> Guillaume Apollinaire (1880 - 1918)
>
> “A master in the art of living draws no sharp distinction between their
> work and their play; their labor and their leisure; their mind and their
> body; their education and their recreation. They hardly know which is
> which. They simply pursue their vision of excellence through whatever they
> are doing, and leave others to determine whether they are working or
> playing. To themselves, they always appear to be doing both.” -L.P. Jacks
>
> On Sun, Jul 10, 2016 at 11:20 PM, Mark Drillock <modrillock@gmail.com>
> wrote:
>
>> There are 2 relays in the engine relay box. Both must click on for the
>> fuel pump to run. Your symptoms sound like the typical bad or loose
>> connection in the main fuel injection power supply path. I have seen it
>> many times. Usually it is at the alternator red wire but can also be at the
>> starter red wire or the wiring box red wires.
>>
>> One of the 2 relays clicks on when the key switch has sent power to the
>> ignition coil. This relay powers up the ECU with power from the red wire
>> path I mentioned above. The ECU then turns on the fuel pump relay for a
>> second.
>>
>> If the ECU doesn't always get power it won't always run the pump relay
>> when it should.
>>
>> Mark
>> On Jul 11, 2016 7:41 AM, "Fuzzy :philippe" <fuzzmeister@gmail.com> wrote:
>>
>> It's not currently happening and I suspect it's why my van won't start.
>>
>> I normally hear some relay click off around the fuse box when the fuel
>> pump
>> stops, but I can't figure out which relay this is.
>>
>> Thoughts?
>>
>> Philippe
>> '87 Vanagon 2.1 Digifant
>>
>>
>