If you have the kind of AC that has the evaporator in the rear overhead,
pull the left side housing and pull that relay mounted in there. The fan
will stop--if you have this setup. It is not uncommon  for it to get welded
closed.

Jim

On Fri, Jun 4, 2010 at 9:09 PM, ron johnson <rcj.yes@gmail.com> wrote:

> Okay - so my radiator fan has been blasting away for the last so many miles
> and I wanted access to the Thermo Switch on the radiator, hence the question
> regarding the lower grill. This switch is fine..... it is reading open as it
> should at ambient temp. And the fan was still in blast mode with switch
> unplugged.
>
> Next, pulled 2nd Stage Relay to test whether it had failed closed.....
> nope. Relay removed, tested okay and fan still blasting.
>
> Yes, this van did come with an A/C system.... not working and hasn't worked
> for at least 8 years. Electrically, it looks like the 3rd Stage Relay could
> be powering the fan, so I would like to pull the 50 A fuse (yes - 50 Amps!)
> that delivers power through its contacts.
>
> Bentley has a nice picture of the fuse and relay which are located 'behind
> the left side fresh air vent'. Really? Hmm..... is there an easy way to get
> there? It looks like the whole dash would need to be disassembled.
>
> Help/advice appreciated?
>
>
> Also, Re: clamps on the grill:  these are the stock ones with the little
> plastic centers that one is supposed to push out and lose forever inside the
> front body area..... will replace with new if I can find local! Thanks to
> all for their input on this.
>
>
> Ron J.
> PDX, OR
> '91 Betsy