Thank you Joe I really appreciate your help.
I thing the gauge added after market I bout the car second hand it is an ambulance.
I added this pictures I hope it will help if didn't please advice me how to make thing easier to you.
First picture it is the main power switch witch connect with five wires as in the second picture I believe 2 wires (+, -) comes from battery and tow wires(+, -) goes out to the box for lights and fan connected to keys inside the box as seen in the fourth picture and these wires connected to the control panel similar to the last picture
the keys inside in the box for light dome fan refrigerator rear A/Cetc. And all functions well when the car start running (most rest of wires it is for sirens was removed from buyer).
The fifth wire connect to the gauge.
Am not expertise am telling you from seeing I did my best.
What I have noticed the gauge led on when I put switch in on positions (may be the fifth wire connect to switch?) And noticed the car well start if the amps in + numbers am not sure is it related to engine but I doubted because now when I put key in on position I get minus number before I start the engine witch never star if the amps in minus number do you agree with me the engine has nothing to do with low amps and it is electric problems.
The fourth picture is the tray for the battery witch I put three of them 65 amp each, but I removed it to charge after empty from trying to start the car. The fifth picture what am trying to do to converted. Six picture is my car.
Sorry for making the story long.
Thanks again for your time.
Images (Click to enlarge)
Friday, December 27th, 2019 AT 2:32 PM