trailer hitch
 

hi group.
my son has an 2005 santa fe.
it has a factory hitch and trailer wiring.

i'm disabled so we use a hitch mounted platform to haul my powered
chair around.
the problem is at 125 lbs total weight the back of the santa fe sags
down and raises the front enough to shine the head lights way to high.
the dealer has no recommendations or a way to boost the rear
suspension when under a load.
has anyone here had/resolved this suspension problem?
barry