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Old 05-08-2018, 08:57 AM   #1
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OBD II Port Location 1999 Tradewinds 7372

Going to install a Silverleaf system in my '99 Tradewinds 7372 and can't find the port by the steering wheel. This has a 3126B Cat Diesel and Freightliner Chassis. Does anybody know if it even has the OBD Port up front or just back in the engine bay.
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Old 05-08-2018, 09:00 AM   #2
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What chassis is your coach built on ?? Chevy ? Ford ?
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Old 05-08-2018, 09:17 AM   #3
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Good Morning rlgjlg:
I have the same RV as you have.
First, I hope you don't really mean OBD-II. Our CAT diesel engine uses a different data bus protocol and round connector. I use ScanGaugeD myself and am not familiar with the SilverLeaf. If it's for diesel it likely has the correct connector/protocol.
You should find the connector inside the panel on the left side of the drivers seat under the transmission selector key pad. Really hard to find or see, I had to use a mirror. My connector is mounted to the side and points parallel to the wall.
I'll see if I can dig up some photographs I took of mine.
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Old 05-08-2018, 09:18 AM   #4
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NO obd2 port on that one I don't believe, there is a port back by the engine that you can hook up CAT ET (CAT ELECTRONIC TECHNICIAN) to. its a program that is on a laptop. there Is also a sequence to get the engine light on the dash to blink in a series and using that you can determine what engine codes are displayed, and look it up online from there, assuming you have a freightliner chassis like me with a cat 3126 motor.
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Old 05-08-2018, 09:26 AM   #5
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The CAT 3126B uses the J1708 (6-pin) protocol (not compatible with OBD-II).

The J1708 connector is a challenge to find, but there should be a one under the panel left of the driver's seat. On my Freightliner chassis they labeled it "J1587 Data Link." Don't let that throw you. J1587 is the data protocol for the J1708 connector. My had a cap on it (gray) as shown in this photograph.

A second connector will be located near the engine. Mine is above the batteries on the right side of the coach. I know a few CAT owner that have just run an extension from the rear connector to the front.

Here's a photograph of my connector on the right side way up under the transmission controls. I couldn't find it without a video scope or mirror.


Photo: https://flic.kr/p/HipuXR
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Old 05-08-2018, 10:10 AM   #6
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OK , with others posting that your coach is a diesel pusher , here's the connector you'll have to look for .
Sorry to say that if the Silverleaf system you bought doesn't have the correct connector , you'll have to exchange it.
As posted , finding the connector in the dash harness on a Freightliner chassis is a real
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Old 05-08-2018, 10:19 AM   #7
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What a place to find the Port!!

Thank you for posting this reply ! I would have never thought to look there for the port! I found it and it did not have a cap on it. Don't know how you ever got that clear a picture of it ? Does this have any data from the transmission or just the engine data?
Sorry about throwing around the OBD2 port, I didn't know any better.
Anyway, thank you.
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Old 05-08-2018, 01:17 PM   #8
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Quote:
Originally Posted by rlgjlg View Post
Does this have any data from the transmission or just the engine data?
It has a ton of information but the only thing my unit gets from the transmission is transmission fluid temperature. Related to the transmission it will give you RPM, throttle position, MPH, loading, and horsepower.

I've got the ScanGaugeD and have really enjoyed having the extra information, especially all the temperatures.

To get that photograph I stuck a small camera into the space and took several shots blind. I needed to see what was in there and wouldn't have known that the connector was capped!
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