My system check/tachometer gauge , voltmeter gauge , and trim gauge will all light at key on but none will register? The system check functions normally. Could someone tell me what color wire supplies 12v to the gauges via the plug-in wiring harness. I have been advised that since the lights light that my problem is probably the 12 volt source/input wire. I have found an unused/maybe broken yellow wire in the bundle coming from the box housing the gauges but I cannot find another broken yellow mate. I found both a gray and a brown unused but touching the yellow to either does not affect the gauges with engine running, luckily I didn't smoke the wiring harness. Thanks for reading, WJ 1998 Evinrude /Suzuki 70 hp 4 stroke w/ original system check /tach gauge replaced with faria gauges w/sys check function
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