Using factory lights as strobes

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by tnc110, Dec 11, 2022.

  1. tnc110

    tnc110 Light Load Member

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    May 22, 2016
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    I bought a feniex strobe unit to convert my cab lights and maybe a couple other lights to strobe. I have a 389. I wired the feniex to the output wire on my clearance light switch. They work great. Until I turn on my headlights or clearance lights, then they default to solid on. Unfortunately when I turn on my headlights the clearance lights come on and I lose my strobe. I realize these newer trucks use a negative signal to turn on some lights. Any advice on how to set this up so that I can run my strobes with headlights?
     
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  3. Hammer166

    Hammer166 Crusty Information Officer

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    Haven't run a Pete in forever, but don't they run everything through a body controller like everyone else? If so, I would imagine you want to tap in downstream of the controller (and you probably want downstream of the relay, too.)
     
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