: Is This an Aftermarket Secondary Battery Setup?? (Pix Attached)

11-15-10, 09:03 PM
This vehicle was purchased used and I don't have history records.
I downloaded the Owner's Manual and do not see these items pictured in the manual.

I'm not familiar with aftermarket audio installations.
However, this car is equipped with a Playstation, VCR, Power Converter, and some other electronics...

From what I see, I assume that this setup (secondary battery pictured below) was installed to account for all the power the audio/video components would demand... we never even use these components.
(I've identified the following two parts but don't know what the black thing is;
Stinger SCB80 High Amp Circuit Breaker (http://www.hifisoundconnection.com/Shop/Control/Product/fp/SFV/30046/vpid/1333040/vpcsid/0/rid/123284?utm_source=google&utm_medium=base&utm_campaign=GoogleBaseFeed)
SVR28-12 Audio Battery (http://www.ebatteriestogo.com/SVR_car_audio_batteries.htm))








I've been having alternator problems as expressed in this post (http://www.cadillacforums.com/forums/cadillac-escalade-ext-esv-forum-1999/215232-02-ext-battery-not-charging-alternator.html).
If this secondary battery is dead, would that be causing my alternator problems???

11-15-10, 09:59 PM
Yes, it's a second battery. The relay is there so that when the truck is off, the 1st battery can't drain the second, or vice versa.

When your truck is running, the relay is turned to the "open" position and your alternator will be charging both batteries. When the truck is off, the relay is turned off. The very small red wire coming off the relay should be hooked up to a remote or accesory wire only getting power when the truck is on.

11-15-10, 10:48 PM
Got it. Thanx. Found/fixed the problem with the Alternator. Will run a test on the second battery to see if it is holding the appropriate charge....

QUESTION - IF that second battery has a bad cell, won't it drain power? And IF I use the reset switch on the circuit breaker as a kill switch, will that eliminate such drain?

11-16-10, 10:41 AM
I would replace that secondary battery if I were you - it looks nasty, even if it's holding a charge right now the corosion that has been scrubbed away from the terminals that has stained the sides of the battery tells me it won't for too much longer. Rule of thumb is to replace the battery once corosion starts to form because the battery is on it's way out.

Also - I don't know what kind of amps you're running or how many watts but if you're pushing more than 500 watts (real 500 watts, not max total of all the channels added up) you should probably replace all the wiring in your truck. The wires coming off that 2nd battery looks like it's barely 8 guage, if that.

11-16-10, 08:26 PM
Good call on those small wires! Minimum should be 4GA on there. On the bigger systems I would try and run 1/0GA positive and ground closest as possible to the amps. What kind of sound system you got in there?

11-17-10, 02:44 PM
The sound system is stock...
But there is a Playstation, TV, VCR, Power Converter (to Edison) and maybe one or two other things...
My girlfriend has had the car for years and I have only been with her 5 months. She got it used and it had high miles on it when she got it (I think in '05). When she first got it and her kids were small, she used some of those accessories, but now the kids are grown and none of those are ever used any more...

I concur about the battery replacement... For now, I have used the reset button as a kill switch on the circuit breaker, removed the battery, and redundantly used zip ties to suspend the positive lead with tension to avoid any grounding contact. When we get some extra $, we may replace that battery, but for now, it is just extra weight and risk we don't need to lug around. We don't really have money to burn on something that we are not going to use.

As far as the wiring... I could easily change what is under the hood to a higher gauge I suppose. If and when I replace the battery, I will give that consideration...

Thanx to all who responded. Y'all affirmed what I thought and taught me the one component was a relay.