M923a2 lights failed

[Cannoncocker]

I picked up my M923a2 Thursday out of Barstow. After a through safety check we drove it home with no problems. This morning the truck started and ran fine until I turned on the headlights and nothing? No high or low beam, clearance or brake lights. Only the dash lights work? I have manuals ordered. Any ideas as to where the headlight breaker is located on the M923? Perhaps the main light switch failed? Never had one of these goof up before but anything is possible! Thought I would check with the experts before tearing into the wiring. Thanks in advance for your thoughts. John..........

 

[harleyboy1]

My 923 just did the same thing as yours. What did you find?

 

[162tcat]

I've had 2 trucks do that. It was the switch on both of them.

 

[emmado22]

Which light switch do you have? the 3 lever, or the POS digital one?

 

[Cannoncocker]

M923a2 Headlights Failed

As always I started on the wrong end and after pulling and testing both seal beams I cleaning all the grounds. The front side marker lights worked but no power the the headlights (high or low beam) After working my way back trough the wiring and dimer switch I replaced the headlight switch. Lights are working like new. Brake lights are back on also. The upside is knowing every body ground I could find from the cab to the front bumper has been sanded clean and reinstalled with a dab of dielectric grease. The sad part in the switch that failed looks new and was dated 2007? Must have been made by the lowest bidder. Good luck on yours.

 

[harleyboy1]

Got a 2007 NOS 3 lever off flea-bay coming. I'll let you guys know what happens......

 

[11BC2]

Is the old school manual light switch compatible with the digital variant?
Meaning, is it plug and play?

 

[juanprado]

Is the old school manual light switch compatible with the digital variant?
Meaning, is it plug and play?

Yes, same pigtail connector. Digital has an extra external ground wire.

 

[emmado22]

Yes, it is plug and play, and eventually fails, no matter how well it is grounded. If it fails in a spectacular way, your truck's wiring also catches fire and melts/burns.. They SUCK! Do a search, you will see.........

 

[11BC2]

Thank you, gentlemen, for the information.
I have ordered an old school switch.

 

[harleyboy1]

Thank you, gentlemen, for the information.
I have ordered an old school switch.

Just curious, where did you get your switch from?

 

[11BC2]

Just curious, where did you get your switch from?

From one of our vendors here.
http://www.tnjmurray.com/militaryvehicles/index.cfm?shop/home

 

[5tonman1971]

Did you fix the problem? Any updates?