Freightliners electrical issue........

[Papabear]

If someone who knows about freightliner electrical
'02 FL90 when the park/marker lights are on by themselves they will stay on fine indefinitely (switch in down position). But when the headlights are on with the park/marker lights (switch in up position) the park/marker lights go out after awhile on there own. Than if all the lights are turned off (switch in middle position) or just the park/marker lights are on (switch down position) the lights will come on after awhile on there own.

I have already changed both park/marker circuit relays
I have already tested the breaker's
And as far as I can tell the switch is fine (If the switch is screwed wouldn`t the headlights go out too?)
I am out of ideas

 

[cm1hedge]

I would replace the switch anyway. Freightliner uses 2 different power sources and differest sides of the switch for headlights and marker lights. You could have bad contacts on the marker light side of the switch(up side only). I won't swear to it.

 

[Papabear]

i will try that
but i am still open to more suggestions

 

[cm1hedge]

I primarily work on 97-99 FLD120's. That is where I would start. If I think of something else, I will post more.

 

[94f450sd]

I would replace the switch anyway. Freightliner uses 2 different power sources and differest sides of the switch for headlights and marker lights. You could have bad contacts on the marker light side of the switch(up side only). I won't swear to it.

+1the switch should be a 6 prong like what is used on the older fisher plows for the lights.one side is headlights and one side is parking lights.one side can go bad

 

[NJKen]

I agree with all the above posts. Freightshaker uses some of the crapiest switches on planet earth.
Ken

 

[Papabear]

I will swap out the switch this morning thanx guys I will let you know how it goes

 

[Papabear]

I agree with all the above posts. Freightshaker uses some of the crapiest switches on planet earth.
Ken

I personally believe freightliners to be the crapiest trucks on the planet
as the saying goes: "I would rather have a sister in a ********** than a brother in a freightliner."

 

[NJKen]

I personally believe freightliners to be the crapiest trucks on the planet
as the saying goes: "I would rather have a sister in a ********** than a brother in a freightliner."

Mee too I was just trying to be nice

 

[Papabear]

Mee too I was just trying to be nice

I don't own it my boss does
I wouldn't own one

 

[Papabear]

so i changed the switch and it is stilll doing the same thing

 

[Papabear]

This weekend I am going to open the wall and fix with 2 street "T" one where it should have gone in the first place and another as a cleanout so I don't have to remove the goosenecks if there is a next time. Oh yeah and remove the clog.



THANKS GUYS FOR ALL YOUR SUGGESTIONS.

 

[NJKen]

Freightliner has a clog in the wall now! I knew they where crappy trucks but geez
As long as the lights on you kitchen sink still work all is well
Ken

 

[Gary79F250]

Is this one of those friggin' Freightshaker ground start systems that the asians and europeans used for years? If it has a cat in it it is a split system most likley, What a Healthy PITA. If you are still having problems start by Isolating the wires and make shure that the switched return is not going to ground, aqlfo they like to have internal harness meltdowns, mostly where the wiring to the hood is run by the hood hinges. If that doest work out PM me and ill give you my number. Ive worked on quite a few of these.

 

[NJKen]

Agreed. I have been through the hood hinge harness meltdown a few times as well as teh harness in the front wheel wells for the signals melting down. From the porblem described I really would have blamed the switch first.
Ken