Monaco Cayman 2005 Owner's Manual page 294

A Single Pole Single Throw relay (SPST) is an
electro-magnetic switch consisting of a coil (terminals
85 & 86), one common terminal (30), one normally
closed terminal (87a), and one normally open terminal
(87).
When the coil of the relay is at rest (not energized)
the common terminal (30) and the normally closed termi-
nal (87a) have continuity. When the coil is energized, the
common terminal (30) and the normally open terminal
(87) have continuity.
NOTE:
When there is power applied to the coil, the
coil sets up a magnetic field in the windings.
When the power is removed, the field col-
lapses. A momentary high voltage discharge
will occur. This is how an ignition coil works.
EXAMPLE:
294
Section 9 --- Electrical Systems - Chassis
Singe Pole, Single Throw Relay 12 Volt DC.
080405
080405d
Cayman 2005