Installing a new Tach w/o warning lights, want to add external lights...Please Help.

NC Bass Chaser

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May 19, 2012
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Hi everyone, I'm new to the forum and to boating. I've found a lot of great info here so far, but was unable to search and find an answer to my electrical dilemma.

Here's my issue:

I have a 97 Hydra Sports 185ER w/ a Johnson 150 FastStrike (two stroke) and I changed out all of the gauges. The problem is the tach. I bought a Teleflex that doesn't have the Hot, Low Oil, No Oil, and CHK ENG lights like the factory OMC. I want to wire in 4 LEDs on the dash so I still have these lights. I have identified the different ground wires coming out of the factory harness and wired them to the respective lights along with a power jumping to each. That was the easy part. Now I want the buzzer to activate when one of the lights illuminate like it did from the factory and have no idea how I can get these 4 ground wires to the buzzer without all of the lights illuminating if one is tripped. Hope that makes sense? Is there some sort of relay I can buy or am I all wrong in thinking that I need the ground from each light to go to the buzzer for it to work properly?

Any help here would be greatly appreciated, and I apologize if this has been previously covered.

Thank you.

John
 
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