Help identifying – dash wiring

[88suburbanoverlan]

Hey guys, I have a few wires behind the dash and I’m not sure if they are disconnected and deleted on purpose or if I need to plug them in somewhere.

First one pictured is a thick purple wire with a hook connector on the end and a tag reading “G3150”

Next one is a black wire that appears to have some kind of black connector on the end.

The other one is a gray and peach colored wire with a female connector on the end that reads PED

The last picture is the three bulbs that I have and I’m wondering where on the gauge cluster they go if someone can help me out with that. I also have an orange wire with a female connector and I’m not sure if that goes to the black wire connector or not if someone can help me out please.

 

[bucket]

The pinkish wire is missing it's connector body. Looks like it should maybe go into the connector body on the red wire pictured. Likely unplugged for a reason, I'd guess.

I don't recall about the black wire. Likely for an accessory that is not installed.

The one that says PED on it. That's the connector manufacturer. Packard Electric Division, I believe. I don't remember what those wires are for though.

The other ones go to your gauge cluster. One is for your 4 Wheel Drive light, the other is a fiber optic cable that sends cluster backlighting to the ash tray.

 

[ButchM]

Been a minute but as I recall the thick purple wire was used in the starting circuit. I recall once, bypassing the clutch petal switch by cutting and butt connecting this wire on a 69 Nova so I could start the car in neutral. My 90 Vette has the same wires.
Hope this helps some.
I'll ponder more.
Buckets post on the fiber optic to the ash tray is on point.
Butch

 

[Matt69olds]

The tan and gray wires are left front speaker. The pink/black tracer and black/white tracer goes to the green box near the speedometer head. The green box is the VSS (Vehicle Speed Sensor buffer) basically a speed signal input the the cruise control and the ecm for the lockup torque converter. As for the pink/purple colored wire, does the suburban have rear window defog? I don’t know if that was even a possibility on that vintage suburban, but I do know GM used purple for the power feed to the rear defog grid.

If it does have defog, there will be a timer module with a matching purple plug.

 

[75gmck25]

In a GM vehicle, black (or white) wires with no stripe are grounds. If disconnected they will cause some accessory to not work properly. .