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OVEN ELECTRIC IGNITION SYSTEMS
Spark System
The spark system has had two different spark modules used. Until late 1993 a white Robert shaw SM2 module was
used. This spark module was not polarity sensitive. Early 1994 the units have a blue technical components 0+1
spark module. The technical components spark module is polarity sensitive. When changing from Robert shaw to
technical components, the polarity must be checked with a meter prior to connecting the module.
NOTE: Do not rely on the original wire hookups as the polarity may not be correct and the technical components
module will not stop sparking (See wiring diagram #13).
Both of these spark modules sense the presence of pilot flame and stop sparking automatically by sensing the
change in resistance when the spark has to travel through the pilot flame. Therefore it is imperative that the high
voltage lead wire not have any nicks, cuts or splices. Also, where the high voltage lead wire connects to the spark
module, the connector must be clean and tight. A poor ground will cause either module to not stop sparking.