2007 Pontiac G5 radio display is dead

None, just replace the switch. The flashers are controlled by the Body Control Module and you can't disconnect that.

Pontiac G5 (2007-2010) fuses and relays

https://fuse-box.info > pontiac > pontiac-g5-2007-2010...

In this article, you will find fuse box diagrams of Pontiac G5 2007, 2008, 2009 and 2010, get information about the location of the fuse panels inside the car, ...

their are 7 recalls on the 07 none are for an electrical problem with lighting system
http://www.pontiacproblems.com/recalls/G5/2007 and the following tsb from march 2010 is for flickering lights

• TSB #PIC-5073B NHTSA ID #10034409
  • Date Announced: MARCH 01 2010
  • Additional Info: How to Fix
  Summary: CHEVROLET/PONTIAC: VARIOUS ELECTRICAL CONCERNS. SIR LIGHT, IP LIGHTS FLICKER/INOPERATIVE, PARKING LAMPS FLICKER/INOPERATIVE, TAIL LAMP DIM/INOPERATIVE, TRUNK OPEN LIGHT, RADIO INOPERATIVE DOOR LOCK INOPERATIVE, NO START, NO CRANK. POSSIB
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ELECTRICAL SYSTEM:WIRING

• TSB #PI-0817 NHTSA ID #10047261
  • Date Announced: SEPTEMBER 01 2012
  • Additional Info: How to Fix
  Summary: CHEVROLET/PONTIAC/SATURN: ENGINE FAILS TO START AFTER ENGINE CRANKS DUE TO FUEL PUMP WIRE HARNESS CONNECTOR NEEDS REPLACING, WITHOUT REPLACING FUEL PUMP COVER ASSEMBLY (FUEL PUMP FLANGE). MODEL 2007-2010 COBALT, G5, ION. *PE
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ELECTRICAL SYSTEM:FUSES AND CIRCUIT BREAKERS

• TSB #PIC-4578 NHTSA ID #10022806
  • Date Announced: JUNE 01 2011
  • Additional Info: How to Fix
  Summary: EPS/STR WHEEL CONTROL FUSE (#19) OPEN. *KB UPDATED 10/04/07. *NJ UPDATED 8/7/09. *PE UPDATED 8/1/11. *PE
  
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• TSB #PIC3385 NHTSA ID #10020916
  • Date Announced: FEBRUARY 01 2008
  • Additional Info: How to Fix
  Summary: REPEATED PARK LPS FUSE OPEN. *KB (ADDITIONAL INFORMATION) UPDATED 4/1/08. *NJ
  

2007 Pontiac G5 Recalls CarComplaints com

On this website (link below) you find fuse box diagram and description for Pontiac G5 (2007)

Pontiac G5 2007 fuse box diagram Auto Genius

sounds like the dimmer switch itself is bad that is usually the colporate.

Have your battery tested / charged.
Totally dead battery may take some extra time to charge being hooked to cables.
When a battery is "hard discharged" as you described...sometimes they never recover and require replacement.

On this website you find fuse box diagram and description for Pontiac G5 (2006 - 2007)


Pontiac G5 2007 fuse box diagram Auto Genius

this is an anti theft device. it must!be reset. radio shop body shop car dealer. sorry.

if you hold the 1 and 4 presets and you get 3 lines like this - - - then that meens there is no code stored so the problem is not in your theftlock but the radio or power to it.

you can have two things wrong with your car 1 a/c control head is bad. 2. temp blend door actuator is bad. change actuator first. make sure you install it before you plug the connector.