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View Full Version : courtesy light affecting tach in 98 190 lt1


bratcop
06-04-2014, 01:49 PM
1998 ps 190 everything works well except when I turn on the courtesy lights. Boat is new to me and I noticed that win I turn on courtesy lights, (factory installed), the tach reading drops significantly. Ideas? Haven't looked into it yet..tach signal should not be tapped for 12v from factory, correct? Anyone got a schematic for this boat? Thanks, Bratcop.

bratcop
06-04-2014, 01:51 PM
Oh, and engine speed isn't dropping, only tach reading by 2k.

mikeg205
06-04-2014, 01:51 PM
I doubt anyone will have the diagram - I would trace wiring from courtesy light to 12volts and ground. probably some corrosion in the wires.