Lights on running board

2002 GMC Sonoma Stereo Wiring Information

Radio Battery Constant 12v+ Wire: Orange
Radio Accessory Switched 12v+ Wire: Yellow
Radio Ground Wire: Black
Radio Illumination Wire: Gray
Stereo Dimmer Wire: Brown
Stereo Antenna Trigger Wire: Pink
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue


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https://www.justanswer.com/dodge/1lq45-won-t-parking-lights-work-dodge-ram.html
All connections inside the IPM are made by printed circuit board, no wiring is used. All connection between the front control module, the fuses and relays, and the connectors underneath is all done through circuit board. What happens is moisture coming through a vent hole in the bottom will cause corrosion on the circuit board which can cause circuits to open up. The most common circuit to have this problem is the park lamp driver circuit. The FCM turns on the park lamp relay by grounding a circuit through the circuit board.
The normal repair done on these is to replace the IPM, but as you've found it's quite expensive. What I've been doing for a few years now is opening them up, finding and repairing the bad spot on the circuit board with solder. Since it can be hard to explain I've made a short video showing my process, which you can view HERE.-->
DR IPM repair
https://www.youtube.com/watch?v=Puho2026BFs

Chevrolet HHR Car Radio Wiring Chart Car Radio Battery Constant 12v+ Wire: Red/White
Car Radio Accessory Switched 12v+ Wire: Run a wire to the steering column and use the brown wire at the front of the center console on the passenger side.
Car Radio Ground Wire: Black/White
Car Stereo Power Antenna Trigger Wire: Pink
Car Stereo Amp Turn On Trigger Wire: Pink Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Dark Green
Right Front Speaker Positive Wire (+): Light Green/White
Right Front Speaker Negative Wire (-): Light Green
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Brown/White
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Tan

The flasher unit for the four ways is separate from the turn signal.
If the rear light is flashing fast means the front light is malfunctioning. Check all wiring from the dash to the light itself. I had one a wire was pinched and had broken

If you confirm the side marker lights,tail lights,fog lights and/or dash illumination are inop,and fuse number 39 is open,the wire harness is chafed/damaged at either the left or right front side marker lights....Removed both front side marker light and repair the harness wil fix your problem.....Let me know if you find any damaged wire harness

Windstar Car Stereo Radio Wiring Diagram - All years
Car Radio Constant 12v+ Wire: Green/Violet Car Radio Switched 12v+ Wire: Yellow/Black Car Radio Ground Wire: Black/Light Green Car Radio Illumination Wire: Green
Left Front Speaker Positive Wire (+): Orange/Light Green Left Front Speaker Negative Wire (-): Light Blue/White Right Front Speaker Positive Wire (+): White/Light Green Right Front Speaker Negative Wire (-): Dark Green/Orange
Left Rear Speaker Positive Wire (+): Light Brown/White Left Rear Speaker Negative Wire (-): Light Brown/Yellow Right Rear Speaker Positive Wire (+): Light Brown/Green Right Rear Speaker Negative Wire (-): Brown/Pink

Speakers
1995-1998: 5" x 7" Front door and side panel 1999-2003: 6" x 8" Front and rear door

More likely it is the hazard/turnsignal/highbeam/cruise control switch module. It costs about $275 for the module. However there is a repair kit for the likely culprit...the hazard button. Try jiggling it around a little, see if that helps. Spray a little WD-40 into it so it can jostle back into it's correct position. You could try a junkyard unit or Ebay. It's not too hard to change. The hard part is doing it without removing the steering wheel. It can be done. I've done it. But hopefully you can locate the repair kit which costs about 15 dollars. Good luck.

Constant 12V+ Brown/White
Switched 12V+ Orange
Ground Black/Light Green
Illumination Pink/Black
Dimmer Pink
Front Speakers 5" x 7" Doors
Left Front (+) Gray/Blue
Left Front (-) Yellow/Blue
Right Front (+) Blue
Right Front (-) Yellow
Rear Speakers 5" x 7" Side Panels

Left Rear (+) Blue/White
Left Rear (-) Blue/White
Right Rear (+) Blue/Black
Right Rear (-) Red/Blue

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i see this problem alot and there are many different reasons each time. sometimes its the actual tail light capsule and sometimes its the running light wiring to the bulb

there is a main wire that runs down the drivers side under truck runns towards runnin board this set of wires one positive and one negetive per light check the wires going to each light take the light apart and also check bulbs.repair any bad connections .