2006 Ski Doo REV Service Shop Manual, Page 324Get this manual
Section 07 ELECTRICAL SYSTEM Subsection 04 (ACCESSORIES)
TACHOMETER
No light but the needle moves The tachometer is supplied through the speedometerCheck the voltage between pins and 10 of speedometerThe obtained value should be the battery voltageIf not, check connections and wiring harnessIf the voltage is good, replace the tachometerA33E1MA
Using the multimeter FLUKE 111 (PN 529 035 868), measure the voltage between BLACKBLUE and REDGREY wiresThe obtained value should be the battery voltageMeasure the voltage between BLACKBLUE and GREENWHITE wiresThe obtained value should be volt under battery voltageDynamic Test Install pins in each speed sensor connectorInstall wire jumpers between pins