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Old 04-15-2008, 05:59 PM   #1
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have 8.1 liter gas engine the problem is the air horns just stop working the switch on the dash is lite. have checked all fuses have checked all reset buttons.have no power to the pump checked the selonoid anded it is fine what am I missing bfisch thank you for any help.
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Old 04-15-2008, 05:59 PM   #2
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have 8.1 liter gas engine the problem is the air horns just stop working the switch on the dash is lite. have checked all fuses have checked all reset buttons.have no power to the pump checked the selonoid anded it is fine what am I missing bfisch thank you for any help.
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Old 04-15-2008, 06:03 PM   #3
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Did you check the ground wire on the pump to see if it has come loose?
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Old 04-15-2008, 06:45 PM   #4
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Power WHERE at the solenoid? A solenoid has to power inputs (switch and battery), one ground and one power output (to the device, i.e. the horn pump in this case).

If you have power at the solenoid output terminal but it doesn't reach the pump, then the wire from solenoid to pump is broken or disconnected. If you have power from the switch to the solenoid but the solenoid doesn't close, then the solenoid is bad. If the solenoid closes but no power flows through, then you probably have no power to the solenoid frm the abttery.
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Old 04-16-2008, 07:29 AM   #5
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One of the common problems that I've read thru the years on this forum is that the air solenoid valve gets stuck due to rust and corrosion at the needle valve. If it's not used for a long period they will stick. You could try rapping (tapping) the solenoid on the side with a wrench to see if you can break it loose. If you know you're gettting power to solenoid, and tapping doesn't work, then remove the solenoid and clean the gunk out.


Good luck,
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