Author Topic: Ground problem  (Read 2015 times)

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Offline Captpar

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Ground problem
« on: January 04, 2019, 11:24:25 AM »
Can a dirty neg battery connection cause intermittent ground problems?

Offline ziggyh

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Re: Ground problem
« Reply #1 on: January 04, 2019, 05:11:08 PM »
Yes it can, but might be better to describe what problems you are experiencing to maybe get a littel more detailed feedback.
ZiggyH

2007 Revolution LE
C9

Offline Captpar

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Re: Ground problem
« Reply #2 on: January 05, 2019, 06:35:13 AM »
Gauges again , replaced all gauges one at a time worked well for a few months. Now flicking on and off accasionally while driving. Currently working fine .

Offline ziggyh

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Re: Ground problem
« Reply #3 on: January 05, 2019, 09:43:15 AM »
Do all the gauges flicker on and off at the same time? Do you know what type of gauges you have. Are they individualy wired with wires on the gauges or are they part of a cluster or circuit board. Could you post a picture of one of your gauges.     
ZiggyH

2007 Revolution LE
C9

Offline Ken Carpenter

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Re: Ground problem
« Reply #4 on: January 05, 2019, 10:02:39 AM »
When I had this problem with a Freightliner chassis it turned out to be a loose battery connection.
2005 Winnebago Journey 39K, C7 350HP
Jeep Grand Cherokee, Airforce One
Diesel RV Club Officer & Board Member

Offline David.e.atherton

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Re: Ground problem
« Reply #5 on: January 05, 2019, 10:23:16 AM »
Hi, guys cannot agree with everyone more . Grounds on a motorhome that shakes
Going down the road or lot of moisture and dirty connections. Another thing that is real
important  is the ground connection on Cat and Cummins engines relation to the operation
of the engine ECM of which many problems are root cause os engine problems.
Ask Dave, Dave Atherton Retired Cat Mechanic

Offline Captpar

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Re: Ground problem
« Reply #6 on: January 06, 2019, 06:14:50 AM »
All gauges flicker at same time,each gauge is individually wired.

Offline David.e.atherton

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Re: Ground problem
« Reply #7 on: January 06, 2019, 06:30:21 AM »
Captpar, yes each gauge is grounded and problem is still present, let’s look at the ground
With a test light to ground and see if light come on or even very dim but shows current is
feeding the problem. If each gauge is grounded it has to have a point of one main ground
where everything is together. One thing what kind of unit do you have in question here and
 What year, is this a electronic engine and what engine. If this an electronic engine you need
To start your troubleshooting at the Wire harness at the Engine ECM connection that feeds
Data to the front panel via. Data link J -1 and is connected to ECM with a little Allen screw.
Ask Dave, Dave Atherton Retired Cat Mechanic

Offline ziggyh

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Re: Ground problem
« Reply #8 on: January 06, 2019, 03:34:14 PM »
If the ground checks out OK I would check and see if the gauges have a common voltage regulator that supplies the power for the gauges and have a helper monitor the voltage while driving to see if it drops off.
Year and chassis info might help should someone have a wirring  diagram.
ZiggyH

2007 Revolution LE
C9

Offline David.e.atherton

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Re: Ground problem
« Reply #9 on: January 06, 2019, 05:01:05 PM »
ZiggyH, yes it would be very helpful to assist member with problems when information
Is provided of what a person is dealing with. This is a very big problem spending a great
deal of time dealing with a unknown .the year and type of unit , engine type and serial
number think maybe we could get from person wanting help. Ask Dave, Dave Atherton
Retired Cat Mechanic.

Offline Captpar

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Re: Ground problem
« Reply #10 on: January 07, 2019, 05:35:35 AM »
2007 sports coach elite, cat C7

Offline Captpar

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Re: Ground problem
« Reply #11 on: January 07, 2019, 05:36:38 AM »
Freightliner chassis’s

Offline David.e.atherton

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Re: Ground problem
« Reply #12 on: January 07, 2019, 06:03:47 AM »
Captpar thank you, you have a 2007 Caterpillar C-7 engine. Can you provide the engine
Serial number also. I will need the serial number to pull up the engine build date and spec’s
wiring diagrams. we need a starting point and will start at engine and work away from
engine. We can help you but problem could be is several areas and the root cause of problem
and what is happening aftermathof problem now can be in different areas.
Ask Dave, Dave Atherton Retired Cat Mechanic

Offline David.e.atherton

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Re: Ground problem
« Reply #13 on: January 07, 2019, 06:30:30 AM »
Captpar, now that we now have information that your engine is an electronic engine and
after I can get the engine serial number and pull up technical information on engine.
Again the starting point at the engine ECM wiring harness connector at the J-1 data port
On ECM that gives all engine data to the front dash panel. Could be something simple as
Wire harness connected. Into the ECM Allen bolt holding Wire harness into the J-1 data
port is loose and breaking contact. ( note: just for starting point at ECM, there is 12 volt
switched wire red wire at pin 70 than you have 4 ground to different pins ). There is also
another unstitched 12 volt wire feeding the ECM. Than we go further if needed. This is
the reason information on what we are dealing with is ever so important, the year type of
engine model and serial number is needed. Many would think simple problem in dash
area been down these before assuming you are correct only to find root cause of problem
Is again located in didderent area. Ask Dave, Dave Atherton Retired Cat Mechanic

Offline Captpar

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Re: Ground problem
« Reply #14 on: January 13, 2019, 05:41:48 AM »
Will crawl under Rv this week and find engine serial number , where should I look for it ?

Offline Ken Carpenter

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Re: Ground problem
« Reply #15 on: January 13, 2019, 06:16:05 AM »
Here’s a photo showing location of serial number and emissions sticker:

« Last Edit: January 13, 2019, 06:51:50 AM by Ken Carpenter »
2005 Winnebago Journey 39K, C7 350HP
Jeep Grand Cherokee, Airforce One
Diesel RV Club Officer & Board Member