Hmmm. I have this same problem. I swapped out the blower switch with a new one, but no change. Hoping someone else has solved this before.

On Jun 28, 2012, at 2:11 PM, Finn Runyon <finnrunyon@GMAIL.COM> wrote:

> Hi All,
> I have been quietly plugging along on lots of projects on the 87 Westy.  What currently has me stumped is that I only have high speed (#4) on the air conditioning blower speed.  I swapped out the switch from my 89 which works on all four speeds, but it does not work on the 87.  I have scoured the Bentley but have not been able to identify a relay that may be bad.  As always your help is much appreciated.
> Finn Runyon in Taos NM
> 87 Westy Pooh
> 89 Westy Roo