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List of all Polaris PWC LR modules
LR voltage regulator modules - substitution and upgrade optionsLR voltage regulator modules - common wire colorsBlack => Ground (Also connected to the metal tab)Yellow <= RPM signal from magneto stator battery charging coilRed/Purple <= Battery power feed for switched output, also voltage reference for voltage regulator (battery charging)Orange => Switched voltage output from LR module. Senses engine rotation from Yellow wire and supplies battery voltage to Orange wire. Turns off Orange wire power when engine stops spinning. Normally feeds switched power to Bilge pump, Electric Quick Trim, Electric Reverse and domestic CDI (Red/Purple into CDI module)
LR module Wire colors specific to certain PWC models & modules
Red/White (LR-52, 4060110) Switched low voltage (2.5 volts?) output for analog dial fuel gauge (Fuji 750)Tan (Overheat) LR-54 & LR-54-1 (4060145) - Tan input from heat sensor, RPM limiter signal output (Gray wire to CDI)Pink (Fuel level) LR-54 & LR-54-1 (4060145) - Low fuel level (Pink voltage over 3.1 volts) triggers RPM limiting on Gray wireLR-54 RPM limiter on SLX780, others (1995 SLX780 used 4060129)
Virage and Genesis (LR-505, LR-503)Black/Yellow - Ignition Kill - Lanyard Stop switch grounds Black/YellowBlack/White - Starter solenoid (in from solenoid) Also senses Start/Stop switch press when engine is running to stop engine.Purple/White on Virage and GenesisStarter solenoid enable (out to MFI, Purple/White is grounded when MFI unlocked)
Freedom
Note: There is a second Purple/White on Freedom, completely separate from the LR-505 module's Purple/White (which is grounded in the Freedom)
Purple/White wire is 'LED Sync. driver' to Freedom fuel gauge 3280445
LR-85 controls warning LED on Fuel Gauge display (Purple/White) and RPM limit signal to CDI (Gray)
Blue - Oil level sender (100 ohms to ground = Low Oil)
Interchangeability of 2000-2001 LR-503 (spade terminals in electrical box) with 2002-2004 LR-503 (plug connector, no electrical box)As far as I know the wire colors and functions are the same for the LR-503-1 (4010724) [Ficht engines 2002-2004 Virage i, Virage TXi, Genesis i] and LR-503-1 (4010346) [2000-2001 Ficht models, spade connectors, inside electrical box].
Notes
There is an updated revision LR-503-4 (4010906) as the original LR-503-1 (4010724) is known to fail over time
The LR-505 module used on carburetor engines is slightly different electrically, despite having the same wire colors as the LR-503.
I think this pair can be replaced with a single LR-505, should either one fail.
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