While driving with headlights on I turn on the high beams and all lights turn off

Hi,

It sounds like the switch could be the problem. I'm saying that since all lights are affected. Here are directions for testing the switch. You will be checking the resistance between specific pins on the switch. The attached pics correlate with the directions.

________________________________

2012 Dodge or Ram Truck RAM 1500 Truck 4WD V8-5.7L
Headlamp Switch
Vehicle Sensors and Switches Sensors and Switches - Lighting and Horns Headlamp Switch Testing and Inspection Component Tests and General Diagnostics Headlamp Switch
HEADLAMP SWITCH
DIAGNOSIS AND TESTING - HEADLAMP SWITCH

WARNING:
To avoid serious or fatal injury on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before attempting any steering wheel, steering column, airbag, seat belt tensioner, impact sensor or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the SRS. Failure to take the proper precautions could result in accidental airbag deployment.

See pic 1

Remove the headlamp switch from the instrument panel. (Refer to 08 - Electrical/8L - Lamps and Lighting/Lamps/Lighting - Exterior/SWITCH, Headlamp - Removal).
Disconnect the instrument panel wire harness connector from the back of the headlamp switch.
Using an ohmmeter, test the resistance or continuity between the terminals of the switch as shown in the Headlamp Switch Tests table.

Test

See pic 2

_______________________________

If the switch is good, then we need to check the totally integrated power module (TIPM). They are known to have issues with the connector pins failing.

Let me know what you find or if you have other questions.

Take care,
Joe