1998 GMC SLE Z71 EXT Cab Light Pulse problem Help Please

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HorneDawgZ71

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Mar 2, 2013
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NWA, Arkansas
Ok guys here the problem and nobody I know can figure it out lol

One day i got in my truck and turn the headlight switch to the on position and all my relays under my dash start clicking like on and off and my headlights struggle to stay on . If i flip my headlight switch back and forth a couple of times the relays will stop clicking and the lights will stay on and work properly. on top of all that every single light in my truck would pulse. I replaced the alternator and the pulse went away but the clicking in the relays and the headlights freaking out hasn't gone away. So let me know what you guys think it is thank!
 
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