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Yannett1 · 03-01-2016, 10:33 AM

I have just brought a 1990 345LE.
Can someone tell me how to blow the air horns.
Also I don't know how to turn off the lights on the right and left side of the door.
I am sure I will need more help soon.
Thank you ,
Vince

Mike1997 · 03-04-2016, 10:32 PM

Vince, if your air horn is not working it could be a problem with the solenoid valve. Mine had to be replaced to make it work.

Vycan · 03-05-2016, 07:37 AM

where is the solenoid valve?

Mike1997 · 03-06-2016, 07:23 PM

Unfortunately, I an not sure. It was repaired while in for service at the Freightliner dealer in NC. I think its located inside the front hood area near where your air hose would be connected. It has tubes going in different directions and one may trace to your air horn. BTW....my air horn is near the front license plate. Older models may be on the roof or elsewhere.