Stock electrical

[marvinwillis 10+ year member]

Im pushing 1500w in my car and my lights dim and the amp turns off from low voltage, what can i do to stop this

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[terra 5,000+ posts]

big 3

 

[basscort2009 5,000+ posts]

and buy one of my batteries lol

 

[528hz 10+ year member]

and a bigger batt

 

[RidnClean 5,000+ posts]

all of the above //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[marvinwillis 10+ year member]

and a bigger batt

recommend me a battery.. also how do i do the big 3

 

[ejschultz 10+ year member]

I've got an Optima D34/78 yellow top up front with 1/0 for my big 3 and I still get dimming with my 1100 watts rms my amps supply. The voltage drop is relatively small at idle, 14.4 goes down to about 13.8 at a minimum now. It's still enough to dim the lights, but nothing to force the amps to shut off. I've got the K68 (105 amp) alternator. See which alternator you've got. If you have a 94 to 96 Caprice look for K68 or KG9 on the spid label on the trunk lid. Those are the 105 amp and 140 amp alternators, respectively. These alternators are NOT interchangable. You would also have to change the alt bracket which is a lot of work. If you have a 93 or earlier, I can't really tell from your avatar, I'm not sure of the alt ratings. With 1500 rms, you may need a higher output alt or a second battery or both.

 

[marvinwillis 10+ year member]

I've got an Optima D34/78 yellow top up front with 1/0 for my big 3 and I still get dimming with my 1100 watts rms my amps supply. The voltage drop is relatively small at idle, 14.4 goes down to about 13.8 at a minimum now. It's still enough to dim the lights, but nothing to force the amps to shut off. I've got the K68 (105 amp) alternator. See which alternator you've got. If you have a 94 to 96 Caprice look for K68 or KG9 on the spid label on the trunk lid. Those are the 105 amp and 140 amp alternators, respectively. These alternators are NOT interchangable. You would also have to change the alt bracket which is a lot of work. If you have a 93 or earlier, I can't really tell from your avatar, I'm not sure of the alt ratings. With 1500 rms, you may need a higher output alt or a second battery or both.

i got a 1991 caprice, but i got my alternator replaced in november but i dont know how much amps is it

 

[ejschultz 10+ year member]

Oh, and big 3 is a must. I see now that you're driving a 91 or 92. I can't tell which though from the pic. I've talked to you about this before. You have the TBI engine in there that I don't know too much about. The big 3 shouldn't be too difficult, but my pics won't help since the engines are completely different. Run a new positive batt to alt, batt neg. to ground, and engine block to ground. Put about a 250 amp fuse on the wire from the batt to the alt.

 

[marvinwillis 10+ year member]

Oh, and big 3 is a must. I see now that you're driving a 91 or 92. I can't tell which though from the pic. I've talked to you about this before. You have the TBI engine in there that I don't know too much about. The big 3 shouldn't be too difficult, but my pics won't help since the engines are completely different. Run a new positive batt to alt, batt neg. to ground, and engine block to ground. Put about a 250 amp fuse on the wire from the batt to the alt.

but the thing i dont understand is, what do i do with the old grounds, do i just cut them off of the stock terminal rings. Then i just replace them with new terminal rings and wire?

Also what gauge wire should i run...

 

[wgsj_fortvalley 10+ year member]

big 3

x2

and a bigger batt

x2

recommend me a battery.. also how do i do the big 3

and the big 3 isnt hard at all. alt positive to battery. endine ground to battery and chassis ground to batt. do it out of 0ga wire and ur good to go.

 

[wgsj_fortvalley 10+ year member]

but the thing i dont understand is, what do i do with the old grounds, do i just cut them off of the stock terminal rings. Then i just replace them with new terminal rings and wire?Also what gauge wire should i run...

i do.

 

[basscort2009 5,000+ posts]

recommend me a battery.. also how do i do the big 3

the one in my sig. best deal you will find on here for batteries.

 

[SWFL 10+ year member]

recommend me a battery.. also how do i do the big 3

grab a battery from the guy above trust me will run that 1500rms like its nothing

 

[marvinwillis 10+ year member]

grab a battery from the guy above trust me will run that 1500rms like its nothing

ok ill do that when i get the extra money