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Electrical System

Discussion in 'Chevy Trucks' started by markq, Dec 2, 2005.

  1. markq

    markq Member
    Messages: 47

    Hey guys....I need some info that I'm hoping someone here can either give me the answer to , or tell me how I can check.

    I need to know what the amp draw is on my electrical system under normal load at night - ie. lights, defrost, heater, radio,and anything else that may be running on the trucks electrical system (not including plow, warning lights, and extra backup lights)

    I know how much my plow, lights, and all other added on equipment draws, but I dont know how much the truck itself is drawing.

    I'm trying to figure out if i should get a larger alternator or not. The stock one is 105 amp, and I can go as large as 145 amp without modifying anything, but the extra 40 amps is around $250. I need to decide if I really need it.

    Thanks alot guys!
  2. Merc1100sc

    Merc1100sc Senior Member
    Messages: 245

    Cant give you any hard numbers, but, i have an 05 hd w/ the plow prep(145amp) and dual batteries. im running a fisher 8.5v.. and, ill tell you that phucker draws some juice. a lot of it.. id say go w/ the larger alternator.. u can never overbuild something.. might save you lots of aggravation when its 10 degrees out and you've got a foot of snow on the ground..