what are these and Why the F are they unplugged???

[Cortinas316]

Subject says it call...I bought my rig used and it already had a pcm installed... was poking around d under the steering today and saw these just chilling. Any ideas??

 

[digglesworth]

Pretty sure I have those up there too. Unplugged as well... What they are? I have no clue.

 

[Cortinas316]

Pretty sure I have those up there too. Unplugged as well... What they are? I have no clue.

not worried about it...but curious. my rig has been f'ing you so bad lately I really could care less.service stab sys Error everything I start up with my airbags light on since I had a mechanic service a transfer case leak.....I wanna punch him because it wasn't on before I took it in...now these lights are on and my horn doesn't work. I'm fed up.

 

[woodwardsh3]

I have them to I used the 2 pin for a 12 volt source. on with key on
maybe for a trailer brake just a guess.

 

[K0PIR]

service stab sys Error everything I start up with my airbags light on since I had a mechanic service a transfer case leak.....I wanna punch him because it wasn't on before I took it in...now these lights are on and my horn doesn't work. I'm fed up.

Do you still have the oem battery terminals? They have caused weird problems for some.

Rich - K0PIR

 

[cgalpha08]

They might be the hookups for a brake controller, can't remember if our rigs came with that or nor

 

[SedonaBound]

They might be the hookups for a brake controller, can't remember if our rigs came with that or nor

I believe you're right since the factory trailer wiring harness and plug has a brake circuit. Maybe one cable for a manual controller, one for a brake pedal switch?

 

[GoBlueHummer]

I have them to I used the 2 pin for a 12 volt source. on with key on
maybe for a trailer brake just a guess.

I also used the 2 pin plug as a power source.

 

[rsc]

Dang it, someone posted what they were several years ago and I can't remember. They are normal, nothing to worry about. I want to say they are for an accessory like one of the roof or grill lights.

 

[woodwardsh3]

I installed The grill lights and it comes with all the wiring, and those are not a used with the grill lights. I dont know about the cab lights

 

[rascole]

Maybe someone with a stick can help. Maybe interlock for the clutch?

 

[3rdH3]

I think I remember they were wiring for the lower grille and overhead aux. lighting. They terminate under the fusebox.

 

[rascole]

These wires are under the dash of mine as well and are not used. The wires for the aux lighting doe snot have any connections on them, they have shrink wrap on them. My first thought was for the clutch interlock so the 3 could not be started unless the clutch was depressed.

 

[f5moab]

They are NOT the trailer brake connections. Those are four blunt cut and taped wires up under the dash to the right of the steering column. (Bk is ground, D-Blue is from controller to rear trailer plug, RD is from 30A fuse and L-Blue is signal wire from brake switch).

The 4-pin blue connector is the clutch start switch; I believe it has a pink wire in terminal A and that would be ignition 1 and B is the signal to the computer.
The 2-pin black connector is the Clutch position switch and Terminal A (I think) is also a pink ignition 1 wire and B is the switch signal for cruise control