In the engine compartment main wiring box the black wire has a
connection that could be bad and cause your problem. The black wire on
one side of the connector comes from pin D15 of the dash and then it
splits off on 2 black wires to 2 places including to the coil.

The D15 pin is on the other side of the dash fuse/relay panel. If you
have the Bentley diagrams the panel is best shown on page 97.68 and the
same fuse/relay panel diagram works for all 86-91 vans.

The D connector is the top center one. That page shows which pin is #15
of that connector. Unplug that connector and look at that pin.

Mark

John Goubeaux wrote:
>
> I replaced the ignition switch and then I checked for current at the
> ignition coil black wires ( terminal 15 ) and do NOT get any current
> there at all with key-on-power. So looks like you nailed it ( again )
> Mark !
>
> So, when you say:  "burned out pin D15 of the main panel."  you mean
> it's disconnected, corroded or ?  What's my next step? I assume open the
> panel and investigate ? Any pointers on what to look for etc. at this
> point.  I assume that current flows from the D15 pin directly back to
> the #15 connector at the coil, right ? OR is there anything in between ?
>
> Doesn't look like I'm gonna need those relays that I ordered !
>
> Thanks again -john
>
>> From there the smaller of the black wires carries power over to the 2
>> relay sockets to enable them. That is what you found missing, the
>> enabling voltage at pin 86 of the FP relay socket. Check the black
>> wires for voltage when the key is on.
>>
>> Mark
>>
>>