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Got it! Here's what we're looking at in the distribution box. The blue wire on the bottom right hand side is coming from the alternator. The big pink wire on the right hand side, also from alternator. On the opposite end of the distribution box there are two main harnesses. The top one has 2...

My alternator guy asked me to unplug the alternator cable from the alternator and ground the blue wire to the case if the alternator. If the light doesn't come on there is an issue with the circuit. If it comes on and stays on there's an issue with the alternator. Thats how I was told to test...

Thank you everyone for helping to educate me on this topic! I do suspect that the alternator works but it isn’t self exciting. The charge light circuit works (the bulb lights up if grounded). The alternator worked when it was tested at the shop. After it was tested I replaced the regulator with...

Perhaps I wired it up wrong. The original alternator had two wires. A red charge wire and a blue dash charge indication light wire. The new alternator has a 3 prong plug so I made a new 8AWG charge wire (twice as thick as the old one) and split that into two separate connectors that were then...

You’re absolutely correct! My understanding is definitely inaccurate. I’m new at this and learning as I go. There’s a chance that it is working correctly after all and I am misunderstanding the whole thing. I have kept it on a trickle charger every night because I’m worried about running low...

I’ve done it so many times now that I can’t recall so I will measure again over the weekend. I know how to measure the battery but what is the proper way to measure at the distribution block and at the alternator terminals? One probe on alternator and the other on distribution block or on back...

I'm getting closer to installing my dual battery system but I have been having an issue with my alternator for quite some time that I can't seem to be able to resolve. I rebuilt the stock alternator about a year ago. Then the regulator crapped out so I replaced it with an adjustable regulator...

This is the gauge I have: https://ebay.us/v90Dcn I assume it’s very low draw so what is the lowest draw relay you can buy for a gauge like this? It says that it has “Built in over current, over voltage and short circuit protection, it well protects the whole circuit.” Does that mean I don’t...

What kind of relay would you recommend for something like this? Preferred brand and rating? What is your preferred online source for electric supplies?

That’s it! That’s my preferred option! Thank you! The digital dual volt gauge I have has two hot (+) and one shared ground (-) contact on the back of it.

What’s the alternative? Why would you want the gauge lit up all the time, even when the engine is off? My plan was to have the gauge turn on at position 1 on the ignition so the motor wouldn’t be running but all dash accessories turn on. Position 2 is motor running and Position 0 is off. Has...

It’s a simple and cheap, Chinese digital dual battery volt meter that I bought off of eBay. I bought so I can monitor the voltage of each battery in real time. Just curious if anyone else have installed a dual battery voltmeter gauge and how they went about doing it.

I want to know the most accurate voltage reading at the point of each of the two batteries without interference of other appliances, losses or draws. I don’t know if standard practice is to have a gauge of this type to be fused. If its advised then I will. I’m leaning towards an in-line fuse...

I don't know if they need a dedicated fuse. What say the experts? An inline fuse is a another option. As I understand it, each battery will need to be connected to a circuit specific to each battery in order to monitor that battery correctly. If a bunch of other appliances are on that circuit...

I thought I'd share my little rainy sunday project from last week. I designed a dual battery tray insert that mounts in to the existing holes of the Mercedes W460 battery tray. The sides will act as a heat shield as well as mounting point for my Blue Sea Systems Automatic Charging Relay, fuses...

Thanks Scott! The Odyssey 34-PC1500 label says: Cyclic Charge Voltage: 14.4 - 14.8v @25C Float Charge Voltage: 13.4 - 13.8v @25C Apparently there are adjustable regulators that allows you to set the voltage output you want. I'm just going to take my rebuilt alternator in for repair and add an...

Very helpful. Thank you! I will certainly test and report back. It may take a little while as I have been having alternator issues and my alternator just died. I had the stock alternator rebuild 13 months ago to 80A. The regulator died in July and about a week ago it started flickering and last...

I've been told that 13.8 V charging voltage is typical for the OEM 55A Bosch alternator.

Crazy question. Is there some sort of load sensing device that I can connect to my battery to get an accurately load history report from?

Great question. I’ve been told that my old G draws next to nothing stock. Here is a rough draw calculation of the accessories I have. The compressor would be intermittent use and I may add a winch at a later time. LED Headlights ~2.5A LED Driving Lights ~2.5A Fridge ~3.3A Webasto ~3.8A LED...