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Colorado guy

Voltage drop

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I have a new altinator ... from singer .. It's hooked up and running. I noticed when I start my truck ...it sits at 145. When I drive it drops to about 12.6. And  stays there .. is this normal or do I have a bad ground some where .. I have all xs power batterys 

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have u done the big 4?

Our u getting any belt slip?

Is it doing it under load?  ( ac, heat, system turned up)

What is your electrical like?

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I do have the big 4 done ... electronics right now are two amps  one dc 90.4 and one dc 5 k got one xs power battery group 3400 and two 3100 . I do have some belt slip ... just when it shift at higher rpm ... I was going to get a slightly smaller belt to see if it fixed that .... nothing's hooked up at the moment ... so  there is no load on it ... I believe this truck does have a PCM controlled altinator ...there is not much I can do about that 

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it is PCM controlled. GM vehicles 2004 and newer received that "upgrade". You can get around it by having dual alternators. leave your stock alternator for the truck, to be controlled by PCM, and use your Singer alt separately for the aftermarket stuff. The singer alt will need to be self excited. Contact Mike Singer about accomplishing that, and he'll likely only charge you parts plus shipping to get it done for you. it might sound tedious to have two separate electrical systems in one vehicle, but it's rather simple.

 

edit: I'd like to correct myself. I believe 06/07 is when they started the PCM b/s, I got confused with that stupid current sensor they started in 04.

Edited by reedal
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it would attach next to the current alt with a proper mounting bracket. if youre contacting singer you should receive parts that are essentially "plug and play", no modification, or little to none, it should all bolt on

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