DarryllI dont know where my turn signal relay is my turning signals dont work ,and my rear parking lights dont come on . can you help me ( 1999 pontiac bonneville )

Go to http://www.bbbind.com/free_tsb.html free wiring diagrams ! You having tail light problems ? Do you know how they work ?

They are turned on by the BCM !
Park, Tail, Marker and License Lamps
The park, tail, license, and marker lamps are turned ON when the headlamp switch is placed in either the HEAD or PARK lamp positions, or anytime the automatic light control (ALC) turns the headlamps ON. When the headlamp switch is placed in the park lamp or headlamp positions, ground from G202 is applied through the signal circuit to the BCM indicating the park lamp request. In response to this signal, the BCM applies ground through the park lamp relay control circuit energizing the PARK LP PCB Relay. With the relay energized, battery voltage is applied through the switch side of the relay, both park lamp fuses, and the supply voltage circuits illuminating the park, tail marker, and license lamps. Ground for the left front park and marker lamps is provided at G101 and the right front park and marker lamps at G100. Ground for all rear lamps is provided at G302.
Turn Signal Lamps
The LT T/SIG and RT T/SIG fuses located in the underhood fuse block supplies battery positive voltage to the body control module (BCM) for turn signal and hazard lamp operation. When the turn signal switch is place in either the LEFT or RIGHT position, ground from G202 is applied through the turn signal switch signal circuit to the BCM indicating the turn signal request. In response to this signal, the BCM applies a pulsating voltage to the front and rear turn signal lamps supply voltage circuits cycling the lamps ON and OFF. The BCM also sends a message via GMLAN to the instrument panel cluster (IPC) to cycle the turn signal indicator ON and OFF depending on the position of the turn signal switch.
Ground for the turn signal lamps is supplied as follows:
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G101 provides ground for the left front turn signal lamp

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G100 provides ground for the right front turn signal lamp

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G302 provides ground for the left and right rear turn signal lamps

Did you replace the flasher?

The parking lights should be on a different circuit from turn signals - hazard lights. The bulbs usually have two filaments, one for each circuit.
On most models there is a tail light fuse and relay that handles front and rear parking lights.

The parking lights, dash lights, turn signals, and hazard flasher should be 4 different circuits.
So you would need to know exactly what that fuse protects, then look for the short to ground.

On your model,there is a separate hazard relay to the turn signal relay.On the fuse block(right-hand side kickpanel just inside the r/hand door)the upper left relay is the turn signal relay.Bottom right is for the hazards.Hope this helps you.

I NEED TO LOCATE THE SWITCH WHERE IS IT ?
MY INDICATORS NOR HAZARD LIGHTS ARE WORKING I DONT KNOW WHAT IS WRONG WITH IT CHANGED BULBS BUT NOTHIGN THEY ALL WENT OUT AT THE SAME TIME
SO THERE MUST BE A RELAY SWITCH SOMEWHER BUT DONT KNOW WHERE ?
THANKS FOR HELPING

More than likely you need to replace your turn signal relay located on the fuse panel.

The signal lights work through a relay but the brake lights work through the signal switch, if both are out I think you'll find the problem is the signal switch.

i would say try to replace the relay,(it should be in the fuse box) for the signals. if it's not that it could be the brain it's located in the colum of the steering unit.

start with a fuse, then go on to a turn signal relay. turn the level left or right on the steering column with the inginition switch on, if the light in the dash lights up but won't flash, it is the turn signal relay.