Either, but most often to the engine.
Ground it to the vehicle frame or engine.
The ground wire leads from the negative side of the battery and connects either to the engine block or to the frame of the automobile.
The negative cable is attached to ground. On some cars is attached to the frame and on some it is attached to the engine.
On the negative post of the battery. Common computer grounds are on the thermostat housing, back of the cylinder head, sometimes on the intake, then main conductors are body to frame, body to battery, body to engine, frame to engine and frame to battery.
There are 3 different grounds. Engine to body ground. Engine to frame ground. Engine to battery ground.
From the battery to frame directly under the battery box. From the frame to the engine at the motor mounts with a short ground cable. Usually on the drivers side.
It runs from the negative battery post to the frame, block, and body.
You can connect the battery ground cable to the frame of the vehicle or to the engine.
Ground? Any good bare metal point on engine or frame
on the frame or on the side of the engine block
Following the cables into the engine compartment. The positive cable will run to the alternator or the starter. The negative cable will just connect to a ground source (engine block, frame, etc.)
In a 1997 Ford E250, the negative ground is typically connected to the vehicle's chassis. You can find the negative battery terminal attached to the battery, which is usually located under the hood. The negative cable usually runs from the battery to a grounding point on the engine block or the frame to ensure proper electrical grounding for the vehicle's systems.