Front running / parking lights not working

[Keith Knight]

2003 m1078a1, I noticed today that my front running/ parking lights down in the bumper are not working. Rear running lights work and all the cab marker lights work, headlights work. The bulbs are good. The relay is coming on.
I may have the interactive electronic technical manual on an old laptop but dang if I can find the wiring schematics that Ron shares with us. I hate that stupid program. If I could just view it like a book one page at a time but I can’t get any where with it.
Thanks in advance for anyone’s help.

 

[GeneralDisorder]

On my truck the front parking lights only work if you select the Park mode. In service drive they are off and only function as turn signals. In park they illuminate as parking lights with the headlights off and blink brighter with the turn signals. I was under the impression this is how they are wired. If it's not then mine don't work either (in service drive).

 

[Ronmar]

Yea i think what general said is normal ops, will look at the drawing when i get home...

 

[Ronmar]

Yep the fronts are park lights, not running lights. The only thing connected to pin L on the switch are the two front park lights via CB65. The only time you get power out of pin L is when the upper lever is in service drive, and the lower left lever is set to park. in service drive, the lower left lever turns off the headlights and turns on the front park lights when set to park.

 

[Keith Knight]

You guys were spot on! They do work as parking lights not running lights.
Thank you!

 

[Third From Texas]

You guys were spot on! They do work as parking lights not running lights.
Thank you!

You can always wire them as running lights. When I do my cab interioor I plan to change the running lights (ie: all parking lights front and read, markers, and brake light function) to come on with the ignition. I recall someone doing it years ago with the manual lever switch (mine is the push button controller) but I don't have the specifics. It was pretty simple iirc (like one jumper wire).

It will also solve those "oh chit" moments when you realize that you forgot to turn on the lights and you've driven home from Lowes with no brake lights or signals working. Daily driver and I do that to often when I have a ton of errands to run. IMO, the brake lights should be functional anytime the truck is running. So I want to make that change as well....

 

[Ronmar]

I am in the process of a lighting makeover and that(front running) is one part of the change. I am also doing halo headlights and driving lights in place of the current front TS assemblies... Hardwired the brake lights soon after I got the truck

 

[GeneralDisorder]

I wired my backup and blind spot cameras to running light power so they don't work unless I turn on the parking lights or driving lights. Keeps me from driving away without any lights on.