What should my voltage be when my car is running...


wew lad

wew lad inc
Mar 22, 2015
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My alternator is in fact regulated

From singer:
"If you have the 2 wire plug (I do) called LIN bus ideally we need to stay on that plug. The bigger alt will stiffen voltage the way it should, that regulator design just does not allow us to achieve a higher voltage set point"
Another person you can ask is JS alternators. They're mostly on facebook so you can try messaging them there.

I personally wouldn't bother if you can't bypass the regulator. Total waste.

Your front battery voltage should equal your rear battery voltage. If it doesn't, your wiring is bad.
 
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danielbea122

danielbea122

CarAudio.com VIP
Jul 29, 2019
339
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Tampa
Another person you can ask is JS alternators. They're mostly on facebook so you can try messaging them there.

I personally wouldn't bother if you can't bypass the regulator. Total waste.

Your front battery voltage should equal your rear battery voltage. If it doesn't, your wiring is bad.
My grounds aren't the best. I'll check all my connections again thx
 
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danielbea122

danielbea122

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Jul 29, 2019
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Quick question. Should my amp ground wire be connected to the frame or to the second battery negative terminal?
 
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danielbea122

danielbea122

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Jul 29, 2019
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Tampa
Ground your second battery to the frame and ground the amp to the battery
After the same drive I make every night with the amp ground to the frame I was at 13.8-13.9.

With the amp ground to the second battery it was 12.7 last night after the same trip.

I'm thinking maybe the original ground isn't very good so Im gonna try a different ground point with the amp ground to the battery.
 
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danielbea122

danielbea122

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Jul 29, 2019
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Come back when you've actually done some troubleshooting
I'm pretty sure it was because I grounded amp to the frame. Also I didn't prep the ground points.

Had only one fuse at the main battery hadn't installed the other 2.

Anyway wasn't too surprised when it blew.

Ordered the taramp hd3000 and third battery. 25ft of ofc 1/0 to tidy up the wiring

Battery,----->200amp fuse-------------->200 amp fuse----->battery------->fuse-------amp

Is that not how to properly wire it?

I only had the first fuse when it blew
 
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wew lad

wew lad inc
Mar 22, 2015
5,812
81
MA
I'm pretty sure it was because I grounded amp to the frame. Also I didn't prep the ground points.

Had only one fuse at the main battery hadn't installed the other 2.

Anyway wasn't too surprised when it blew.

Ordered the taramp hd3000 and third battery. 25ft of ofc 1/0 to tidy up the wiring

Battery,----->200amp fuse-------------->200 amp fuse----->battery------->fuse-------amp

Is that not how to properly wire it?

I only had the first fuse when it blew
That's correct. Your grounds need to be bare metal and you need to check for voltage drop before you're confident that it's a good ground. If your voltage at the bank is more than +-.1vDC different than the alternator/front battery you have a problem.
 
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danielbea122

danielbea122

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Jul 29, 2019
339
37
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That's correct. Your grounds need to be bare metal and you need to check for voltage drop before you're confident that it's a good ground. If your voltage at the bank is more than +-.1vDC different than the alternator/front battery you have a problem.
When I did the big 3 I followed this guy's guide except my runs are shorter and 1/0

If it isn't the ground wire then im going to a pro

Thing that makes me go hmmm is that my headlights or never dimmed when I was running a skar rp1500 and that guy said he had a 500w Alpine amp that made his lights dim when bass notes hit
 
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wew lad

wew lad inc
Mar 22, 2015
5,812
81
MA
When I did the big 3 I followed this guy's guide except my runs are shorter and 1/0

If it isn't the ground wire then im going to a pro

Thing that makes me go hmmm is that my headlights or never dimmed when I was running a skar rp1500 and that guy said he had a 500w Alpine amp that made his lights dim when bass notes hit
That means there's a voltage difference between the front and back.
 
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danielbea122

danielbea122

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Jul 29, 2019
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That means there's a voltage difference between the front and back.
I didn't have my alternator ground connected to the front battery.

I had a ground from front battery to frame and a separate ground from alternator to frame. both in different locations on the car

Could that have caused a problem?
 

wew lad

wew lad inc
Mar 22, 2015
5,812
81
MA
I didn't have my alternator ground connected to the front battery.

I had a ground from front battery to frame and a separate ground from alternator to frame. both in different locations on the car

Could that have caused a problem?
It could. Again it's hard to speculate without you doing actual testing for voltage differences. If the alternator is seeing 14v+ and the front battery sees, say (guessing here) 13.5v and the rear battery sees 12.5 or 13v, you have a big problem.

You really don't even need my advice, you're smart enough to check these things and report back if a more complicated issue occurs.
 
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danielbea122

danielbea122

CarAudio.com VIP
Jul 29, 2019
339
37
Tampa
It could. Again it's hard to speculate without you doing actual testing for voltage differences. If the alternator is seeing 14v+ and the front battery sees, say (guessing here) 13.5v and the rear battery sees 12.5 or 13v, you have a big problem.

You really don't even need my advice, you're smart enough to check these things and report back if a more complicated issue occurs.
Thx bro for the help. I'm at 14.2 after basically starting from scratch and this time making clean shiny metal grounds.

This little taramps 3k is pretty bad ass for such a small footprint
 

wew lad

wew lad inc
Mar 22, 2015
5,812
81
MA
Thx bro for the help. I'm at 14.2 after basically starting from scratch and this time making clean shiny metal grounds.

This little taramps 3k is pretty bad ass for such a small footprint
Glad to hear it. It makes a big difference when you make high quality terminations.
 

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