Need wiring diagram for 2001 challenger 1800 to Install Garmin Depth Sounder

[JD_Pilot]

Does anyone have a wiring diagram for the wires and fuse blocks behind the
steering wheel ? There are a few empty fuses, also not sure where common
Ground is located ?

Thank You !

 

[beerdart]

......................

 

[joha0036]

Does anyone have a wiring diagram for the wires and fuse blocks behind the
steering wheel ? There are a few empty fuses, also not sure where common
Ground is located ?

Thank You !

I ran new wires/fuses because I was installing multiple new switches. I got my power from the master battery cutoff switch and ran my ground back to the negative post on battery. I'd rather not have my accessories messing with my factory systems personally.