Hey I am having issues with my set up on my truck. What wld cause my compressor not to kick on ? I have replaced the cylinoid and my pressure switch and it still isn’t working. I can jump the cylinoid and the compressor will kick on and begin to work,but when I let off of it then it quits working. I have been working 150 plus hrs a week for the last few months and haven’t had time to tinker with it and try and figure out what is wrong…anybody got any ideas ? THANKS TOOLOUD
Bad ground to your pressure switch perhaps? Hard to say without knowing how you have it wired. I’d say go out with a test light and start testing wires.
planning on that if I can ever get home long enough to tinker with it.I am just trying to get ideas on what Might be wrong. I don’t have a manual valve…everything is electric ( 12v cylinoid, 175#pressure switch,button-activates the horn-) I changed my cylinoid 3 weeks ago cause i thought it was bad,but that didn’t fix it, then I replaced my pressure switch and that wasn’t it.Why wld the compressor kick on when I jump it ? I have always thought that when you had to jump it…that meant the cylinoid was bad ? right/wrong ? thanks mp
By cylinoid (solenoid) do you mean the relay?
And I take it you have a separate pressure switch with only 2 connections?
Where exactly are you using the jumper?
the jumper goes from one side of the relay to one side of the pressure switch, and the other goes to the hot on the solenoid. It has worked for the last 5 yrs until recently and I have replaced what it has been in the past.
Solenoid as in your solenoid valve? That should have nothing to do with the compressor.
I can post a link to a diagram if you need one.
ok, I have a electric valve on my horns…cld that have gone out ? forgot bout that
I swapped my selonoid out and my compressor works now,but My horn button didn’t wanna work tonight…gotta fix that issue tomorrow
Glad you got it working.
my horns still aren’t working…guess i will order a new electric valve, I have power ever where except that valve
The solenoid is the electric valve… if your compressor was not working and all of a sudden is , i bet you have a bad ground. Is your ground on the frame? if not, clean away all paint / rust and use a self tapper and go right into frame thru the ground wire loop. Same with the solenoid…
I had the same problem with my compressor working one day and not next, well every time id hit a bump it would jiggle the ground wire , so i moved it to a better location and its been good since.
i have a 12v selinoid and a electric valve…but don’t have power at my horns on the valve
when you say electric valve , do you mean
Because that is a solenoid, also known as an electric valve…
Now if you say u have a 12v solenoid and an electric valve, that means you have 2 of those or similar in design?
Yeah, there needs to be some clarification.
You have a RELAY for the compressor.
You have a pressure switch hooked to the relay.
Sometimes the relay and the pressure switch are combined into a single unit.
Then you have an electric solenoid valve for the horn.
On the electric valve, the solenoid is what does the actuating.
So the way I understand it - you have replaced your relay and pressure switch & now the compressor works. But now your horn button doesn’t work - which would be related to the electric solenoid valve - which silvy posted a picture above…?
bingo…I have a 12v solenoid,pressure switch,and electric 1/2’’ valve on my horns…I replaced everything except the 1/2’’ electric valve but i have one on the way, so hopefully things will work again soon. From the responses that I have recieved on this i guess I have everything hooked up totally different from everybody else.On my next truck I plan on having a gw valve on them instead of the button, but oh well everything has worked great until here recently…thanks again
2 things…
Again… You have a RELAY and a pressure switch and a solenoid valve.
There is a difference between a relay and a solenoid. Technically a relay has a tiny coil or solenoid that moves the contact, but it’s generally called a relay.
Something still has me wondering if a new solenoid valve is going to fix your problem. You said:
So if you don’t have power to the valve when you press your button, a new valve won’t solve it. You’ll have to check the source of the power. connections, fuses, shorts, etc…
Hopefully you’ll get it figured out & hopefully you didn’t drop $45 for something you don’t need.
well my button has power and my solenoid has power and my pressure switch also has power , but I haven’t been able to check and see if I have power to my electric valve. If I have power everywhere else wouldn’t that be the valve ?
If the only problem you’re having is actually honking, then it’s related to the solenoid valve. I guess all I was saying is make sure that there is power there when you push your button.
If there’s power - then the solenoid valve is the problem.
If there’s no power - it’s in the wiring. connections, fuses, shorts, etc…
yeah that is what i have to check next ( already ordered one anyway ) I have to have somebody push the horn button while I check to see if there is power getting to the 1/2 valve.
Aparentely I have everything hooked up way different that everybody else
i would invest in a multimeter, they are very cheap and great tool to have for testing connections