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Quick Question

Discussion in 'The Garage' started by RatMan, Dec 19, 2002.

  1. RatMan

    RatMan 1/2 ton status

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    if i put in a higher output alternator, do i have to change any of my other electical things? i went to the store to get a new one today, but fergot my cash /forums/images/graemlins/rolleyes.gif never made it back over, but i got to thinking abou this TIA!
     
  2. bad_bo_ti

    bad_bo_ti 1/2 ton status

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    i think you need a bigger power feed wire from the alt. to the battery, i think most places suggest a 4 gauge wire. hope this helps
     
  3. BorregoK5

    BorregoK5 1/2 ton status

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    If I recall correctly, a stock alternator is 45-55 amps. I dropped a 90 amp in my truck without any additional modifications, and I think you can run to a 120 amp safely. Your 89 is 10 years newer than mine, you should be able to run at least a 90 amp safely.
     
  4. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    Bad Bo Ti is correct, you need to change the feed wire to a 4 gauge cable. You don't want any electrical fires because of too small a wire trying to do a much harder job do you? It is cheap insurance anyhow.
     

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