Cadillac Escalade, EXT and ESV Forum - 1999 - 2006 Discussion, Voltage moving up and down? in Cadillac Escalade Forums; Hi guys, I've fitted a JL Audio amp running components. But now when I flash my lights, use windows or ...
- 04-03-13 03:43 PM #1Cadillac Owners Fanatic
- Automobile(s): 2004 Escalade 6.0
- Join Date
- Feb 2009
- Glasgow, Scotland
Voltage moving up and down?
Hi guys, I've fitted a JL Audio amp running components. But now when I flash my lights, use windows or any other power, It cuts the sound out like its stopping power to the amp. It's a month old battery.
What is the problem? It's definitely only since the amp and components went in so must be related somehow.
- 04-03-13 06:37 PM #2Originally Posted by John P
- 04-03-13 09:11 PM #3
Where are the grounds? The ground for my amps fine. Hoping its not the alternator!
It starts and runs fine, just when I use additional stuff it drops the sound and the dash lights dim slightly. But it's only stabs of power it doesn't like. If my full beam is on, it's fine, but if I just flash it doesn't play ball.
- 04-03-13 11:09 PM #4Originally Posted by John P
I was meaning the ground on the battery(it can get in bad shape if not cleaned)
- 04-03-13 11:17 PM #5Cadillac Owners Fanatic
- Automobile(s): 03 Escalade
- Join Date
- Aug 2012
Re: Voltage moving up and down?
It sounds like the charging system doesn't have enough amperage to support the stereo, which is why the voltage fluctuates. Take a volt meter and measure the voltage drop to see how low it goes if it drops below 12v JL amps will shut down.
You can google the big 3 and try that, second option get a capacitor to help level out the voltage fluctuations. Or third get a higher amperage alternator.
- 04-04-13 12:10 AM #6Originally Posted by 6lbsofSound
I don't know why I said ground loop(I guess my mind was elsewhere) but symptoms like this can be from a loose battery cable connection(since its effecting both the lights and amps(the trucks computer modules will shut down unneeded load if underpowered to keep the truck running as long as the PCM can power the fuel pump and relay)
I know as my car did this once(I had left the ground cable loose) I was listening to the radio and went to start the car and everything went dead I wiggled the ground and it started without a issue