I would start by unplugging the connector at the heater motor in the rear
to see if the fuse still blows.  Assuming that the problem seems to be at
the heater motor, I would give the fan a push to see if it's stuck and
maybe try feeding it 12v directly from the battery with some jumper wires,
perhaps with a fuse included in one of the wires.

Larry A.

On Fri, Dec 12, 2014 at 6:43 PM, John Rodgers <jrodgers113@gmail.com> wrote:
>
> I've a friend who  has the '88GL and the rear heater has quit. It  somehow
> blew the fuse to the heater motor AND the AC. Now, it blows both fuses even
> when new ones are put in. Sounds like a dead short but how do you look for
> it? And how does the AC figure into it?
>
> Anybody?
>
> John
>