Voltage

[finkster]

i second this. another battery would only add an extra 10 amps of a load to the alt.

[jrplayer36]

If your alt doesn't have an overdrive pulley, you might want to check one out.

It did come with a overdrive pulley. My truck idles low at 500 to 600 rpm.

[Iraggi Alternator]

I was wondering if its normal for my volt to drop to 12.9 and goes back up? The only time it does this is when truck is at idle or at night with lights on. I have a 220 amp. Iam running a MB Quart 1000.1 and a kicker 650.4 and 2 12's. Any idea

I would check and see what pulley is on the alt.

I personally use a slight overdrive pulley.. a little less than 2"

[Iraggi Alternator]

I would check is there is a lot of charging current going on from batteries needing to be charged.

[jrplayer36]

I would check is there is a lot of charging current going on from batteries needing to be charged.

I only have the 1 batt?

[jrplayer36]

I also have a problem when sitting at a place with truck in drive it seems to drop down 2 13.1 and goes back up and then down etc. And the only thing on is the heat. Plus when starting the truck up in the mornig the alt makes a noise but it only does it once in awhile and when it does its only for a slpit sec.

[Guest DC Power Kyle]

Does it sound like a squeel? if so your belt is loose and you need go tighten it. You may get out of the high 12s if you tighten that belt.

[jrplayer36]

Does it sound like a squeel? if so your belt is loose and you need go tighten it. You may get out of the high 12s if you tighten that belt.

No,belt very tight

[jrplayer36]

I also have a problem when sitting at a place with truck in drive it seems to drop down 2 13.1 and goes back up and then down etc. And the only thing on is the heat. Plus when starting the truck up in the mornig the alt makes a noise but it only does it once in awhile and when it does its only for a slpit sec.

Any ideas on this?

[brewer_brewer]

what kind of sound is it?