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Old 08-08-2009
Blackonblackfx4's Avatar
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Icon5 Volt meter problems, replace alternator?

I put a optima Red top in my truck last fall, im running

2 100w Offroad lights,
800w amp with 2 10" subs
upgraded hallagen bulbs
bunch of LED's in the cab, ( but LED draw little)
mirror Led's

97 000km's

I recharged my battery, and boosted it the other day because it died when i was working on the switch for my offroad lights. But latly i've been watching the Volt gauge in the dash, and it's been alternating between the bottom of the curve to even with the bottom of the battery icon on the guage( under half).

My battery seams to die very fast, and i've noticed if you have the 4 way hazards on with the cab light, the cab light ( also LED) dims with the hazards.

maybe its me, but it sounds like my subs sound weaker as well.

is it possible the sensor for volts is screwed up, or would a optima red top be bad after a couple months? or is it my alternator dying?

If i had a short i think the wire would've melted by now or burned a fuse.

Should i put a new alternator, Im thinking a 130 in case I ever put more offroadlights on it. Will it be nessiary to upgrade the wiring to the battery?

What do you guys think?
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Old 08-10-2009
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Bump. I need to know which alternator to order today from NAPA, what years will give me a 130 A direct fit?
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Old 08-10-2009
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It is definately a failed alternator. However I don't have an answer to the question about what year. They should be able to play around with their computer to figure it out.
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Old 08-22-2009
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Blk on Blk,
Did you get this figured out.
Sounds like like the battery is acting up (Optima's have been known to have bad cells) or as stated the alternator could not be keeping up.
Have them checked under load at a local auto parts store.

I don't know what year Ranger's had the high output alternator but it wouldn't hurt to get one and if you do figure out the year let me know please.
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