1982 Ski-Doo Shop Manual, Page 123Get this manual
SECTION 02 ENGINE SUB-SECTION 06 (503 ENGINE TYPE)
Remove screws (use Phillips no or suitable flat screw driver) Cut the four wires as close as possible to the coil bodyTo pass new coil wires in harness, tape the old wires to the end of new wires and pull them through the harness protector tubeInsert the new wires into the old connector housing and install connectors
replace lighting coil:
Heat the armature plate around the screw holes to break the Loctite bond (200 F)
Protect harness from flame Hea Insert new wires- R
CAUTION: Protect harness from flame
_ CAUTION: Replace the old wires in the connector with the same color coded new wires
Remove screws (use Phillips no3 screwdriver)Remove the wire retaining clip from armature platePullout protector tubes and unsolder the splice connectorsSolder the yellow wire in the harness to the white tube protected wire of the coil Solder the yellowblack striped wire in the harness to the black tube protected wire of the coil