Neil, the high speed fan relay is seldom triggered and thus unlikely to
fail. On a few vans I have put a manual switch in to activate high speed
for special circumstances, using the manual switch to turn on the relay.

One thing I would point out is that the older wiring may not really
withstand heavy use of high speed and I have seen overheating and
melting at the fan fuse holder at S7 on pre 86 models wired to use high
speed more often than stock.

Mark

neil N wrote:
> Hi Mark.
>
> Thanks.
>
>> Use the relay for sure and make certain to fuse things properly.
>
> For sure I will. I have the fuse panel and relays from the 85. I was
> just "wondering out loud" about making things simpler. --- :^)
>
> In my rambling thoughts, I figured that relays do fail, so why not
> make it so that the only other major part (aside from the fan!) that
> could fail would be the thermo switche(s) or fuse. But this thinking
> is based on a lack of knowledge. i.e. obviously I don't fully
> understand why the relay is in the circuit in the first place.
>
>>...........