It doesn't work that way on a 1994 Dodge. You turn the ignition key on, off, on, off, and back on to flash the codes.
The battery's in the trunk, what's under the hood is just a fuse box and terminals to jump the car.
Since the battery is under the quarter panel by the driver's side tire, there is your positive and negative terminals up top where you would hook the booster cables to to jump the car.
Maybe you need a jump start
The battery doesn't have a full charge, or may have a dead cell.
yes
There are auxiliary terminals underneath the hood.
Yes
clean the battery terminals - strong wire brush or a little baking soda & water.
Where are the jump start terminals under the hood on a 2003 e320
I would check the battery terminals, probably a buildup of corrosion between the posts and the terminals, clean them up with boiling water and sandpaper till both parts are shiny clean. If you are connecting the jumper leads to the battery terminals when jump starting and it works fine then this is the only possibility.
The 86 Calais has a connector under the dash, driver side. You have to jump the top right two terminals, turn the key to on (don't start it) and count the flashes.
red to positive terminals black to chasis ground