Hey Guys, needs some help, advice here,.....

2005 Pont Bonneville SE, 3.8 L

Headlights come on and off at will.
Dash lights and gauges come on/off at will
Power Locks have stopped working
Security Warning light comes on and off
I installed a new battery a few weeks ago. All posts are clean.
The auto parts store tested the alternator and said that it was working properly.
I had a shade tree mechanic clean the grounds. He said he got to all of them.
Still continues to act freaky.

I hate to give up on this car because the engine runs good.

I then took it to a Auto Electric Shop to help me with the diagnosis of what is the cause.
The Technician says that he is getting a Code of bad module.
The only problem he says is that it doesn't tell him which module is bad.
He says there are seven, and he would have to go thru each one to disqualify each one he said.
He says that they all have to work and communicate with one another.
Dash, ABS, Engine, Power switches, etc etc.
He says the lengthy diagnosis would end up being more than what the car is worth.
I'm wondering if I would be able to check these modules myself?
If so which one should I start with?
Any other suggestions ?
Is there a more advanced code tester which would show which one?

Or, is this info I'm receiving correct?
Thanks Much!

If I could just get the headlights to stay on, and for the Security chime to stop, I would be satisfied.

Where are you located? I'd have this fixed in a couple hours tops if you could make it to my shop.

_________________
Andrew - owner/operator of Bonnevilles Unlimited

2004 Bonneville GXP | 60k | White Gold Tricoat | custom built supercharged 3800 hot rod | garage queen
1997 Corvette | 55k | Silver Metallic | Z06 wheels | Date-night Hauler/Parts runner
2014 Town & Country Limited | Cashmere Pearl | 95k | Family Hauler
2002 Ram 1500 Quad Cab Sport | Black| 260k | Official Bonneville Hauler

I'm in South Texas, any advice you could give me would be appreciated.