I would opine that the radiator resistor pack is bad. Full fans do not go through the resistor. Lower speeds do. 

> On Jun 7, 2018, at 2:07 PM, OlRivrRat <OlRivrRat@COMCAST.NET> wrote:
> 
>        87 Westy with Factory AC > When AC Switched to ON Neither AC Fan or Rad Fan come On >
> 
> But if AC is left ON, both Fans will work if Van is warmed up enough to Trigger Rad Fan ~