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Message: [QUOTE="strokin6L, post: 356359, member: 842"] Alright, maybe got a little something going on with my battery voltage, but don't know if it's normal or not. To start off...batteries, alternator and starter are new. The ground cables are also new. Now when i cycle the glow plugs and start the truck...voltage is 11.5-11.9v usually. Then after like a minute or less voltage will be high 13's...around 13.5-13.8v. This is all at an idle. Then when i start to drive....voltage will constantly stay in the 13.8-14.2v range until the truck gets up to temp. Now after it gets up to temp voltage averages around 13.6-14.0. I hardly ever use A/C, but since my wifey is pregnant she needs the A/C alot. So when i turn the A/C on to the normal setting and fan on high... voltage wont drop too much, but will stay in the 13.3-13.8 range. Now, when i turn it on max A/C with the fan on high...voltage will drop to 12.9-13.3ish. And if i got all accessories on(headlights, fog lights, A/C on max with fan on high, radio and wipers)...voltage will be in the 12.3-12.7v range at idle. With all the accessories on and driving voltage will average high12-low13 volts. If i keep all accessories on except the A/C...voltage will raise to 13.5-13.8v. Does the A/C really draw that much to drop the voltage that much? Just seems like turning the A/C system on sucks voltage down and not sure if that's normal or not. [/QUOTE]

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