93 Marathon Metal Body

So I wired the converter to the positive on battery 1 and negative on the last battery. The directions I recieved with the converter/reducer told me to wire the positive to battery 6 and negative to battery 1. I assumed this was wrong but tried it first anyway. Now I am back to positive on battery 1 and negative on last battery.

There are 2 wires that are supposed to go to the positive so I connected them together then to the positive. See picture. Also, yellow is supposed to be a ground and the middle red wire is the 12v output.

Took the outgoing 12v wire and ran it to a fuse block with 4 fuses.

So here is my problem.

I hook up the head unit I am installing to one of the wires from the fuse block. I confirm it is hot all the way to the head unit.

When i ground the head unit it doesnt turn on.

Where do I place the ground to? I tried the chassis and a negative on battery 2 and everywhere else. Head unit doesnt work.

Also, when i going it and put the test light on the ground i get light.

I dont understand.

Is there power running through my whole cart. Here's a blurry pic.

I plan to wire some other accessories and I am not sure where to ground everything.

Thanks for any help.

Click to view attachment

YOu dont need an inverter to power 12 volt items. You just go to ground on the first battery and positive on the second battery. THey are wired in series so jumping to the second battery gets you 12 volts, if you go to the third you get 18 the fourth is 24, etc, etc til you add up to 36 volts.


I still have 8" wheel covers too, two types, where are you located?