high beams not working

Do you have the ignition switch turned on? On a Freightliner FLD120 you have to have the key (ignition) switch on for the high beams to work.

 

Per the Freightliner FLD120 manual:

Headlight Switch and Daytime
Running Lights
A three-position headlight switch (Fig. 2.8) is used to
operate the exterior lights. When the switch is up the
headlights, and all other vehicle lights, are on. All
vehicle lighting is off when the switch is in the middle
position. When down, the switch activates only the
clearance, instrument panel, and marker lights, and
the taillights. The switch for the headlight high beams
is built into the turn signal lever. When the headlights
are on high beam, a green light in the warning and
indicator light module goes on. The ignition switch
must be on for the high beams to operate.
For vehicles built to operate in Canada, switching on
the ignition and releasing the parking brakes automatically
activates the headlight low beams (later
model vehicles) or high beams (earlier model vehicles)
at half voltage as daytime running lights. The
daytime running lights will operate until the parking
brakes are applied; then they will switch off. Turning
on the regular headlights will override the daytime
running lights. The vehicle cannot be driven unless
either the headlights or daytime running lights are
activated.

 

yup key has to be on for high beams to work

 

Does the Highbeam indcator come on?

 

The manual can be downloaded for free on freightliners web site. I PM'ed you a link to the manual.

 

Bigsam send me the link also, thanks.

 

left upper part of your fuse panal is the relays for headlights.. the headlight relays also operate your marker lights replace, both the left headlight relay and the right headight relay... also make sure they are not corroded. a windshield that is leaking will soak the fuse panal. then its not a bad ideal to remove and replace all corroded relays