I need help locating ground wires, the issue is flicking lights at a stop car feel rough and then when im drive all feels good no codes the alt and battery is good checked at local autozone. what could be causing this issue. its my family car and need it fixed before inspection.

Moved to [Buick] for visibility. This was originally posted in the "Everything Electrical & Electronic" category of the [Pontiac Bonneville only] section.

Welcome aboard!

Off the top of my head: I'd suggest you make sure the battery terminals are tight and clean. With low alternator speed and higher draw from accessories plus brake lights, sometimes they will have idle issues.

How many miles on your PA?

How many miles have you owned this car?

How many miles on your spark plugs?

How many miles on your wires?

What region does it live in?

173000 miles
56000 owned miles
two yrs ago same for wires
VA
and how to i move the post to buick

The post has already been moved for you.

I have the info on the wiring for this. I'll get my system fired up in just a bit and get you some info.

What lights are flickering? Head or instrument panel? Both?

Both and thank you

#02-06-03-008D: Low Voltage Display on IP Gauge, Lights Dim at Stop Lights, Battery Discharged, No Start, Slow Cranking, Dim Lights at Ilde, Low Generator Output - (Jul 21, 200

low volts, no start, i don't have but at a stop it does run rough i do have a new power steering pump intalled that is still whinning evening after bleeding the system steering wheel turns smoothly

The TSB is bout low voltage output at idle, causing the lights to dim/flicker.......

You said alt and battery were checked......by AutoZone? Normally, they would try to sell you something.....but unless they put it on a machine that would really load your system, I have my doubts about their test......

As mentioned, check for clean tight bat connections.....check chassis ground or neg cable....check connections at the starter solenoid.....check all grounds on the studs of the transmission.......

I would do my own load test: Get vehicle to normal operating temp: turn headlights on, blower on high, and rear defogger on, and check the output of the battery with a DVM.......a fully charged battery, with vehicle not running and no load on it, is 12.6 volts.......on a cold start, should go over 14.0 volts.......at normal op temp, 13.0 volts.......with the load I mentioned, 12-12.6, and then if you rev to 2000 rpm, should be 13 or more...