How to unlock turn signal

[nadroj]

I have a M923 that I recently Purchased, the lights and turn signals do not work, there is a lever that is in the lock position but 'i cannot unlock it. Any ideas

 

[hardimpact]

I have a M923 that I recently Purchased, the lights and turn signals do not work, there is a lever that is in the lock position but 'i cannot unlock it. Any ideas

hold the lock lever (bottom lever) to the right, while turning the light switch lever

 

[porkysplace]

You should read the -10 TM before operating the truck ,It would have explained how to operate the lights.
TM9-2320-211-10.pdf

[h=3]TM's for the M39 Series 5-ton[/h]

 

[papakb]

The way this switch works is you need to lift up on the lock lever while simultaneously moving the switch lever (top lever) to the position you want it in. Right is for the service lights and left is for your blackout lighting. I've had the spring in the lock lever break before and the lever could be jammed either up or down. It only moves about 3/8". The lower left lever is for the dash lighting. People have a tendency to leave the switch in the service brake mode but this leaves the dash lights on if the lever is in bright or dim and this will eventually kill your batteries. Remember to turn the switch off at the end of the day.

Kurt