Battery Voltmeter Installation Question
I had problems with my 12 volt system on my FW and when I pulled the battery I found that it was only putting out 7 volts. The rig stays plugged in all the time. A few weeks ago someone posted a t...
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mabynack wrote:
Is it wired in parallel across the warning lights or in series?
Definitely NOT in series. Always in parallel.
I don't recall specifically what wires I connected to, but they are behind that panel above the meter. And it really doesn't matter. You just need to connect across a +12V and a -12V pair of wires. Your meter will have at least two wires, a + and a -. Some have additional wires for a power supply or a backlight. Those will still work, but the simplest versions just have the 2 wires, and the internal power supply and backlight are all on the same source. It is not necessary to use the wires that go to your existing monitor panel. Any 12V wiring anywhere in the trailer will work.
Here are a couple of different meters that look like they should work fine.
https://www.amazon.com/dp/B00E1CW7FY/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=374PCOJ0N57ZQ&coliid=I1G7N6FCFI49K7
https://www.amazon.com/dp/B00H8KNQUQ/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=374PCOJ0N57ZQ&coliid=IE381E0RNCUJC
Those are both 4 digit, which will read hundredths of a volt.
If you want to keep it plug and play simple, you could get this Voltminder model. It is the same thing I have in the pics above, but it appears it has been remodeled a bit and a fuse added to the cable. It's a little too expensive in my opinion, but the simplicity might appeal. Just plug it into your cigar lighter socket. Hard wire it in later if you want.
http://www.voltminder.com/
