Weight of the Trailer Tongue
The tongue load (A) of any trailer is an important weight to measure because it affects the total gross weight of the vehicle. The Gross Vehicle Weight (GVW) includes the curb weight of the vehicle, any cargo carried in it, and the people who will be riding in the vehicle.
If there are a lot of options, equipment, passengers, or cargo in the vehicle, it will reduce the tongue weight the vehicle can carry, which will also reduce the trailer weight the vehicle can tow. If towing a trailer, the tongue load must be added to the GVW because the vehicle will be carrying that weight, too. See Vehicle Load Limits for more information.

The trailer tongue (A) should weigh 10 to 15 percent of the total loaded trailer weight (B).
After loading the trailer, weigh the trailer and then the tongue, separately, to see if the weights are proper. If they are not, adjustments might be made by moving some items around in the trailer.
See also:
How to Inspect the Engine AirCleaner/Filter
To inspect the air cleaner/filter remove the filter
from the vehicle and lightly shake the filter to
release loose dust and dirt. If the filter remains
caked with dirt, a new filter is required.
...
Climate Controls
A. Fan Control
B. Temperature Control
C. Air Delivery Mode Control
D. Air Recirculation
E. Air Conditioning
F. Rear Window Defogger
This system allows the driver and passenger to control
t ...
Steering in Emergencies
There are times when steering can be more effective than braking. For example,
you come over a hill and find a truck stopped in the lane, or a child darts out
from between parked cars and stops ri ...
