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last year a had a system in it. not too big, maybe 600 watts..worked fine for a while. then my alternator died and figured it was the system that did it and i sold all my ****. put on a new alternator, bought a optima yellow top. nothing electrical for a while. at xmas i put HIDs in. i heard these draw less current than stock lights but im not sure if thats true or not

two weeks ago i was headed to hattiesburg from picayune (about an hour trip) and halfway up there my e-brake light and battery light start flashing at random. "oh ****," i thought. i turned the a/c off and the radio off. it made it just fine. i figured it was a loose wire in the speedo, since i took it off the week before to look at the bulbs)

last week i put an electric fan in. wired it thru a relay and a inline fuse using a diagram off a jeep website (got the fan from a buddy who had it in his jeep). the next day on the way to work my truck died. radio starting turning itself off (that's my indicator when its about to break down.) i got someone to jump me off and got to the service center near where i work. they charged the batt. for 2 hours. took it to advance auto for an alt test. battery was good, alt put out 0.0amps according to the guy. which didnt make sense cause even bad ones put out a little bit. went back home and put my belt fan back on and took the electric one out. went to autozone for another alt test. battery still good, alt now putting out 30amps. i drove to hattiesburg with no problems. it was still doing the thing with the ebrake and battery lights tho. but i used the a/c and radio the whole way without it doing anything weird.

my speedo also jumps around all the time, if that is in any way related.

now my question is, what is causing the problems when i hook up something electric (sound system, electric fan, etc.). what the hell is going on???

i wanna put a system back in my truck, but how can i do it without going thru this bull **** again?

will doing the big 3 upgrade help? ive purchased a capacitor for my next system, will this help?

the alt belt is TIGHT

fyi, 98 frontier, 2.4

i cleaned the corrosion off the pos output of the alternator. thought it helped...no more lights flashing. this was 2 days ago.

this morning on the way home from my g/f's house 1 hr. away (5am- still dark) my truck dies again, and burnt out both of my HID bulbs.

i've heard on other forums that it could be the optima causing this issue, a bad wire, or a bad alternator.

help! :(
 

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It sounds like your alt is having issues. It may be worth a shot. Your case may have been that your alt is only charging at a low rate thus you are running off your battery a lot but with the increased draw from other electric items, you alt/battery can't stand up to the draw and they start to fail.

I would try and change the alt first and see how that goes. You may even be able to get your OEM one re-spun or find one at a junkyard. A new one would obviously better but will cost a bit more too.

Side Note: It may be time to upgrade to a High Output Alt now since you are planning on a system and possibly a larger one at that and an Efan and the HO gives you the ability to upgrade even more after that.
 

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I'd def. go w/a high output alt., if you need to replace it.
But first, wait for it..... I'd clean and grease all my grounds, starting w/the main on the block, since you mentioned corosion on the alt. wire. Get some grease on that one, since you already cleaned it.
There's at least a half dozen places under the hood, look around. Bet you find at least one bad one.
 
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