compressor cycling on/off? - Dodge Diesel

MRuskow · 10-23-2007, 09:01 PM

Hey guys! Im new to this forum and Ive got a question already

There is what appears to be a compressor under my hood, it is located on the passengers side twords the rear in front of the computer. It has a single small line that comes out of the bottom and splits into the dash then across the engine compartment.

I have looked in my BASIC manual that I have and cant figure out what its is or what it does. But it has been cycling on and off about every 45 seconds for the last month. Not knowing what it was I unplugged it as I thought it was connected to the windshield wiper fluid, but it wasnt. The cycling stopped, but I still can figure out what it is and why its cycling...

Any ideas?

Thanks

FMB · 10-23-2007, 09:13 PM

Welcome to DTR. Click the "User CP" up above in the dark blue bar. That will take you to the User Control Panel where you can make a Signature. In the signature, you can put what type of vehicle/engine/year you have so someone can better answer your questions.

ptgarcia · 10-23-2007, 09:17 PM

Could be for an exhaust brake. Give us the specifics of your truck.

MRuskow · 10-23-2007, 09:25 PM

Sorry....

No exhaust brake...

2003/Ram/Diesel 5.9

han solo · 10-23-2007, 09:35 PM

Does it have 2 lines coming off it? Like you said 1 into the dash/cab, maybe the other to the front of the truck, sounds like the a/c compressor, likely cycling cause its low on freon. Is it belt driven?

MRuskow · 10-23-2007, 09:55 PM

This is it with the plug pulled off it....

john.overton · 10-23-2007, 10:48 PM

That is just a vacuum pump used for HVAC or other accessories, they used it for cruise control on some of the earlier models

MRuskow · 10-23-2007, 11:20 PM

Quote:

Originally Posted by john.overton

That is just a vacuum pump used for HVAC or other accessories, they used it for cruise control on some of the earlier models

Why would it be cycling on and off repeatedly?

TonyB · 10-24-2007, 09:37 AM

Quote:

Originally Posted by MRuskow

Why would it be cycling on and off repeatedly?

Not to be too much of a smarty pants....A vacuum leak?

Xonid · 10-24-2007, 11:31 AM

Here's my thread I tried to start that no one cared about

..

http://www.dieseltruckresource.com/d...d.php?t=172687

On my truck the zip ties, holding the hose going under the driver side battery tray, was so tight, the vibration just wore it down over time. I'm not sure what it's connected too.. maybe a cruise control component.

I just spliced the hose and all is good..

I'm sure there are other culprit zip ties out there..

good luck

10-23-2007, 09:13 PM	#2
FMB Registered User Join Date: Apr 2005 Location: El' Norte Mexico Posts: 814 My Photo Gallery My Classified Ads	Welcome to DTR. Click the "User CP" up above in the dark blue bar. That will take you to the User Control Panel where you can make a Signature. In the signature, you can put what type of vehicle/engine/year you have so someone can better answer your questions. __________________ FMB '03 2500 HO Laramie 4WD LB 6SP A-Pilar Gauges (Fuel Boost Pyro) Westin Platinum Nerf Bars Line-X over the rail Walbro 392 (Spring '07) Grid Delete (Jan '08) NO RECIRC DOOR! (Spring '06) '04 Arctic Fox 24-5N (Been to Coldfoot and Inuvik)

10-23-2007, 09:17 PM	#3
ptgarcia Registered User Join Date: Apr 2006 Location: Fontana, CA Posts: 5,776 My Photo Gallery My Classified Ads	Could be for an exhaust brake. Give us the specifics of your truck. __________________ Pauly '06 MegaCab 3500 4x4 SRW 48re 3.73's Suspended by....... Thuren Fabrication Rollin' on............... KMC XD Hoss & 37" Yokohama A/T-S Powered by........... Smarty Jr. Stopped by............ Pacbrake

10-23-2007, 09:35 PM	#5
han solo Registered User Join Date: Sep 2006 Location: Alberta Posts: 337 My Photo Gallery My Classified Ads	Does it have 2 lines coming off it? Like you said 1 into the dash/cab, maybe the other to the front of the truck, sounds like the a/c compressor, likely cycling cause its low on freon. Is it belt driven? __________________ 03 3500 Dually 5.9 4x4 6speed 3.73 gears, Green, debadged, 4" piaa fog lights, Recon smoke cab lights, Trifecta tonneau cover, Line-X, Ultra Goliath dually rims, Afe stage 2/dry filter, F1 Flux 1's, Arp studs, Ats manifold, Htt 62/65/14, Flo-Pro 4" exhaust, Smarty POD, Isspro gauges fuel pressure boost pressure exhaust temp, Pricol rail pressure gauge, Raptor 100 with 2 micron fuel filter, SOS steering brace, Mag-hytec covers, Amsoil bypass kit, 6spd fast cooler.

10-24-2007, 11:31 AM	#10
Xonid Registered User Join Date: Sep 2005 Posts: 120 My Photo Gallery My Classified Ads	Here's my thread I tried to start that no one cared about .. http://www.dieseltruckresource.com/d...d.php?t=172687 On my truck the zip ties, holding the hose going under the driver side battery tray, was so tight, the vibration just wore it down over time. I'm not sure what it's connected too.. maybe a cruise control component. I just spliced the hose and all is good.. I'm sure there are other culprit zip ties out there.. good luck __________________ Dino 2004.0 2500 SLT 4x4 305/555 Auto SWB 3.73 Scotty III/Whistler, Quad X2 Race, Fuel Vent, Smoke Switch, Smarty, Bilstien 5100, Toyo OC A/T 285/75/17, Recon gauges, GDP Walbro 392 Deleted - Silencer Ring, Rokktech

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10-23-2007, 09:25 PM	#4
MRuskow Registered User Join Date: Oct 2007 Posts: 4 My Photo Gallery My Classified Ads	Sorry.... No exhaust brake... 2003/Ram/Diesel 5.9

10-23-2007, 09:55 PM	#6
MRuskow Registered User Join Date: Oct 2007 Posts: 4 My Photo Gallery My Classified Ads	This is it with the plug pulled off it....

10-23-2007, 10:48 PM	#7
john.overton Registered User Join Date: Oct 2007 Posts: 13 My Photo Gallery My Classified Ads	That is just a vacuum pump used for HVAC or other accessories, they used it for cruise control on some of the earlier models