My ramcharger has lost all power. no headlights, no interior lights, no radio, nothing. battery is new and replaced grounging

Have you checked the battery? Are you sure everything is connected/? If you can't get it to start because you have no juice but have a new battery, then that's a problem. Or something is draining the hell out of your battery. Check the fuses.

This sounds like a bad starter but you should of got dash lights and headlights, if there are no headlights or park lights and no dash lights then theres a bad connection, start at the battery remove the terminals and clean posts then follow the groung wire to engine block and make sure theres a good connection to engine, a quick trick is to use jumper cables and connect one end to battery neg terminal and the other end to the engine, a good clean spot of metal and then see if theres power, if there is then its the ground cable to engine, if theres still no power then locate the box that the postive cable goes to, this pos cable goes to the starter and also to a fuse/relay box, check that connection. good day.

It sure sounds like you have a case of "sneak circuits"
These are usually caused by a bad ground somewhere and something is "grounding" through the light bulbs.
Have you changed any wiring or installed a stereo or some other accessory?
You might use a jumper wire and ground the dash and other areas to the negative battery post as a way to find the culprit.

Its the ignition live wire! they are nearly always yellow but please check your diagram. you will need to connect it to live.

you dont have a good ground.

check the fuseable links at the solenoid for power both ends,maybe replace the headlight switch

Your battery or alternator has developed faults

haveyou checked you fuesable link wich is on the fire wall in the engine compartment it will be a red wire comming off of a sidwase dimond shaped block

Does the car run fine and start fine if you don't turn the head lights on ? The symptoms you describe here suggest a battery that is run down, in need of charging or a faulty battery, however if the same batter starts the car without a problem then you have a much more tricky problem to sort out as it seems your lighting circuit is then producing a direct short on power circuit resulting in nothing working. Do the headlights actually come on when you do this and stay on while every thing else goes off ?

The Vehicle information center has two fused inputs. Fuses are #20 and #6, located on the kick area for the accompanying occupant.