sorry just re read the post title, it was the AC relay you meant....

you could pull one of the 2 red wires at the rad fan, one does come
from the ac relay....

alistair

On 4-Jun-10, at 7:09 PM, ron johnson 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