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Topic: Air horn solenoid location? 1988 Oshkosh /Cat GV  (Read 875 times) previous topic - next topic

Air horn solenoid location? 1988 Oshkosh /Cat GV

  Where is the electric to air solenoid?  Which relay, if any, runs it? TIA.
My 88 Oshkosh pusher has air horns that dont work.  I traced the airlines and they end -maybe under the dash?

Re: Air horn solenoid location? 1988 Oshkosh /Cat GV

Reply #1 –
The solenoid valve for the air horns are under the dash in front of the gauges it is round and should have an air line attatched to it
previous 1984 35 ft ORED 250 HP 3208 Cat       
previous 1998 40 ft U295 CAI 325 hp Cummins
previous 2003 40 Ft u320 build #6140 450 Cummins M11.                                                         
1999 Mazda Miata
Ron, Nancy, Tipper the cat, Max The dog
1997 U 270 36 ft build number 5174 8.3 Cummins

Re: Air horn solenoid location? 1988 Oshkosh /Cat GV

Reply #2 –
The valve should come right off the back of the Air Pressure gauge.
91 GV U300 Unihome 40' Build 3811
6V92TA Detroit

Re: Air horn solenoid location? 1988 Oshkosh /Cat GV

Reply #3 –
Thankyou. I thought  that it was the low pressure horn switch.

Re: Air horn solenoid location? 1988 Oshkosh /Cat GV

Reply #4 –
I just purchased a 1985 Oskosh rear engine Cat    I see the air horn on top.  Do they have a city horn?  I'm a trucker every truck on the road has a city horn & an air horn.  I'm thinking the air horn is activated from the center button on the steering wheel..
 Thanks For your help
Philip
Philip M Mahoney

1985 V917 Cat3208 w/ Allison auto 4 speed
build #7433

Re: Air horn solenoid location? 1988 Oshkosh /Cat GV

Reply #5 –
Quote from: Philip –
I just purchased a 1985 Oskosh rear engine Cat    I see the air horn on top.  Do they have a city horn?  I'm a trucker every truck on the road has a city horn & an air horn.  I'm thinking the air horn is activated from the center button on the steering wheel..
 Thanks For your help
Philip
My 91 just has the air horns on top. No city horn like  my Peterbilt.
91 GV U300 Unihome 40' Build 3811
6V92TA Detroit

Re: Air horn solenoid location? 1988 Oshkosh /Cat GV

Reply #6 –
Thank You stump,  The relay clicks when I press the horn button but nothing happens.  Maybe that air valve is bad, I guess if I bypass the valve I'll find out if the horn works. Where can I find that air valve?  I'm going to purchase a dual horn kit and install it in the couch. An old trucker just has his ways of doing things.

Hope someone can help..  This is a new adventure for me.
Philip M Mahoney

1985 V917 Cat3208 w/ Allison auto 4 speed
build #7433

Re: Air horn solenoid location? 1988 Oshkosh /Cat GV

Reply #7 –
Check out the resistance of the holding coil, if open,replace!
George Ray 1992 U280 40'

Re: Air horn solenoid location? 1988 Oshkosh /Cat GV

Reply #8 –
Thank You, is the holding coil the one with the air lines connected?
Philip M Mahoney

1985 V917 Cat3208 w/ Allison auto 4 speed
build #7433

Re: Air horn solenoid location? 1988 Oshkosh /Cat GV

Reply #9 –
Simple change out, got one from amazon, changed out on the Alaska trip last year.
George Ray 1992 U280 40'

Re: Air horn solenoid location? 1988 Oshkosh /Cat GV

Reply #10 –
The horn solenoid valve on mine is mounted on the back of the air gage on the dash. You will see a air line coming off of it that goes to the horns on the roof. The center button on steering wheel energized it. If they are not working give it a light tap while pressing button. Or try wiggle the wire connection.
91 GV U300 Unihome 40' Build 3811
6V92TA Detroit

Re: Air horn solenoid location? 1988 Oshkosh /Cat GV

Reply #11 –
Fixed that problem with a new solenoid.  Thank You
Philip M Mahoney

1985 V917 Cat3208 w/ Allison auto 4 speed
build #7433