Tail Lights, Marker Lights, Air Conditioner lights out

What about them ? What front lights ? Headlamps , park lamps, marker lamps ? They don't work ?

Exterior Lamps
The exterior lighting system consist of the following lamps:
• The Headlamps
• The Daytime Running Lamps (DRL)
• The Clearance Lamps (Y92 roof rack only)
• The Cornering Lamps
• The Front Fog Lamps
• The Rear Fog Lamps (Export)
• The Park, Tail and Marker Lamps
• The Turn Signal Lamps
• The Stop Lamps
• The Backup Lamps

Park, Tail, Marker, License, and Clearance Lamps
The park, tail, marker, license, and clearance (Y92 only) lamps are turned on when the headlamp switch is placed in the PARK or ON position or anytime the headlights are requested. The I/P BATT fuse in the engine wiring harness junction block supplies battery positive voltage to both the park lamp relay switch contacts and the park lamp coil circuit. The body control module (BCM) provides a ground or control circuit to the park lamp relay coil circuit. When the park lamps are turned on, the BCM energizes the park lamp relay. Current flow is from the park lamp relay to the individual park lamp circuit fuses and to their respective park, tail, marker, and license lamps. The front park and marker lamps are grounded at G107 and G103. The tail lamps are grounded at G401 and G402. The license lamps are grounded at G401. When equipped with the Y92 roof rack option, the clearance lamps are grounded at G302. If the driver places the headlight switch in the ON position after the ignition switch has been turned OFF, the park, tail, marker, license, and clearance lamps will remain on until turned off or the battery runs dead.
The T PARK fuse in the rear fuse-relay block supplies battery positive voltage to a separate park lamp circuit connected to the trailer wiring harness.

Do your headlamps work ?
Park/Marker/License/Tail Lamps
Voltage is applied to the turn/headlamp switch at all times. When the turn/headlamp switch is in the PARK or the HEAD position, voltage is applied to the following components:
?€¢
The park lamps

?€¢
The marker lamps

?€¢
The tail lamps

?€¢
The license lamp

The front marker lamps are grounded through the turn filament of the respective front park/turn lamp. The front marker lamps light as a result.
The automatic lamp control function turns on the park lamps and the headlamps. This action occurs when the ambient light sensor determines that the exterior lamps should be turned ON based on the amount of available light. When the BCM grounds the park lamp relay, voltage is supplied directly to the park lamps, bypassing the turn/headlamp switch assembly. When this action occurs, the following conditions exist:
?€¢
The automatic lamp control relay is grounded.

?€¢
The headlamps turn ON. Refer to Headlights/Daytime Running Lights (DRL) Circuit Description .

The lamps turn OFF when the BCM does not ground the park lamp relay or the automatic lamp control relay. This action is caused by the following conditions:
?€¢
The available light reaches a predetermined level.

?€¢
The ignition switch is turned to the OFF position

Check for burnt wires

Running lights, marker lights, and dash lights all come from the park light switch of the head light switch. So, possibly you need a new headlight switch. Or, if you have a voltmeter, you can do some testing of circuits to see where power is and where lost. Also check the fuse for tail lights and horn.

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

Signal and Marker Lights Removal & Installation To Remove:

1. Remove or disconnect the following:
   • Screw from the side marker lamp.
   • Side marker lamp from the front and/or rear bumper fascia.
   • Bulb/socket from the side marker lamp.
   • Bulb from the socket.

To Install:

1. Install or connect the following:
   • Bulb to the socket.
   • Bulb/socket to the side marker lamp.
   • Side marker lamp to the front and/or rear bumper fascia.
   • Screw to the side marker lamp. Tighten to 2 N.m (18 lb in ).

I would start by checking all the fuses, then check the headlight switch,test it for power as you did the tail light, then check the wiring coming out of the cab down the frame to the rear of bed check for a short but if all fuses are good then will not be a short, may be a bad switch and the most important is the bulbs, make sure they are good.

marker lights and brake lights usually are separated -- they use a two filament bulb -- check bulb first -- sometimes the connections get dirty -- use electrical contact cleaner and spray the connections -- if that doesnt work -- there is a short in the wiring

I agree. I would start by inspecting from the tail lights wiring and move up. You will have to remove interior pannels to see the harness.

Took it to the shop. The side marker lights were missing on my son's car. The wiring loops from the side marker lights to the tail lights. As the wires were touching in the front, they shorted out the tail lights. Capped the wires, problem solved!
PS: ordered side marker lights, too.