intermittent wipers

[sean@pacificrim.net (sean kelly)]

Thought I could get the trick programming intermittent wiper feature by
switching the relay. Went from a 443 955 531 to a 1 HM 955 531 C and can
only get the standard 6 sec. delay. To adjust delay I was told to: Switch
to inter. then off, when you want to wipe again switch to inter. and leave
on, this will set time, to reset time turn off and then set as before. What
am I doing wrong, am I wrong about the relay? Anyone BTDT.
Thanks, Sean
'91 200 tq