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Old 02-20-2016, 08:37 PM   #1
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Air pressure gauge

I have a front tank gauge that reads zero and the brake warning light is on but all systems work. Is it a faulty Vehicle Data Unit and where is it located?
The RV is a National Caribbean on a Spartan Chassis.
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Old 02-21-2016, 08:38 AM   #2
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Welcome to iRV2.

Sorry you're here with problems.
I don't know if Spartan ever used the same type of gauge system that gave Freightliner air gauge operation problems ; VDC ( Vehicle Data Center ) that they used for a few years; 98 > 02.
Could you provide some more info on your coach .
Chassis year ?
Have you checked the back of the gauge to see if there is an air line attached , or just wiring ?
Have you tried calling , Spartan Motor Home Support, with your serial number ?
They should be able to provide you with an air system diagram, that would narrow down locations of sensors.
1-800-543-4277
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Old 02-21-2016, 02:55 PM   #3
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Quote:
Originally Posted by Skip426 View Post
Welcome to iRV2.

Sorry you're here with problems.
I don't know if Spartan ever used the same type of gauge system that gave Freightliner air gauge operation problems ; VDC ( Vehicle Data Center ) that they used for a few years; 98 > 02.
Could you provide some more info on your coach .
Chassis year ?
Have you checked the back of the gauge to see if there is an air line attached , or just wiring ?
Have you tried calling , Spartan Motor Home Support, with your serial number ?
They should be able to provide you with an air system diagram, that would narrow down locations of sensors.
1-800-543-4277
Thanks for info. Gauge has wires attached. When wires changed over, rear tank showed empty and front tank full. I have not located the VDU.
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Old 02-21-2016, 03:05 PM   #4
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Originally Posted by Kangaroo View Post
Thanks for info. Gauge has wires attached. When wires changed over, rear tank showed empty and front tank full. I have not located the VDU.
Coach is 2001 35 ft on Spartan Summit 2000 chassis. There are no sensors on the tanks but two 1/4 inch air lines that may run to the VDU. I have found a 4 inch square black box in the rear engine bay that may be the VDU. Is it expensive to replace it?
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Old 02-22-2016, 09:34 AM   #5
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Here is some info on the Freightliner system, as I said , I have no idea if Spartan used the same system, ( Medallion Instruments ).
For pricing , Spartan help line would be you best source of info.
Attached Files
File Type: pdf VDC_Repair FL VDU (1).pdf (235.5 KB, 24 views)
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