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Related issues?
I've got a little list of items that aren't working properly and I would like for them to.

1. Fuel gauge never goes above about 3/4
2. Boost gauge doesn't go above 10psi (silverleaf shows 28 maybe)
3. Temp gauge shows about 220-250 and sometimes...

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Re: Related issues?
Reply #1
A bad ground would be at the top of my suspects list.

P.

Re: Related issues?
Reply #2
Thanks Pierce, that's kind of what I was thinking. I don't even know where to start looking.

  • DavidS
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Re: Related issues?
Reply #3
Yes it's all related to being old!!

Just tackle one at a time and you will get through them in time.

Re: Related issues?
Reply #4
Our ground for many items is under the flip up dash top. Yours is different so will need the advice of an owner of a like coach. Once you find the ground, you can check for anything loose in the fasteners/wires. You can also bring in a jumper...

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Re: Related issues?
Reply #5
Also check your engine ground. With a bad or loose engine ground cable, sensors may give incorrect information to gauges, Try running a jumper cable from the chassis to something steel on the engine like the exhaust manifold or engine lift hook.

...

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Re: Related issues?
Reply #6
Thanks again Pierce. I'll check them out.

Re: Related issues?
Reply #7
You can also bring in a jumper cable with one end to the steel chassis and the other end close to the ground for the dash components. Then use a multimeter on the Ohms setting and...


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  • jor
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Re: Related issues?
Reply #8
Quote
I don't even know where to start looking.

Most of the automotive grounds are in the dash area. Just raise up the cover and look to the left for a bunch of green wires. Here's a photo of the grounds on our 99 320.
jor

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Re: Related issues?
Reply #9
My guru buddy pulled the gauges wires off them and squeezed there ends  tighter then reinstalled them. 

Re: Related issues?
Reply #10
DJ,
You have problems with several items that go to that same ground bus. Seems unlikely they all developed a bad connection around the same time.
Think I would start by checking the connection on both ends of that braided ground strap on the bus...

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  • jor
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Re: Related issues?
Reply #11
Quote
Quote
I would start by checking the connection on both ends of that braided ground strap on the bus bar.
Great idea from John. Here's a couple of photos. One shows the dash end of that braided strap and the other where it is grounded. You will...

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Re: Related issues?
Reply #12
Most of the automotive grounds are in the dash area. Just raise up the cover and look to the left for a bunch of green wires. Here's a photo of the grounds on our 99 320.
jor

Thanks, I guess I did know...

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Re: Related issues?
Reply #13
Thanks a lot guys. I'll check both ends of that and maybe take them off and take a wire brush to them for good measure. It also has trouble firing the engine. I would say most of the time. It's done it off and on since we purchased it a couple...

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  • jor
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Re: Related issues?
Reply #14
Quote
It also has trouble firing the engine.

I'd do like Pierce suggested and check the chassis ground. My recommendation is to find every ground on your rig, take it apart, wire brush it and reinstall. Find where big black cable attaches to the...

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Re: Related issues?
Reply #15
I'd do like Pierce suggested and check the chassis ground. My recommendation is to find every ground on your rig, take it apart, wire brush it and reinstall

Thanks again. I'll get the big book out and...

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Re: Related issues?
Reply #16
Thanks for the info Jor! 

Still learning and this was definitely one of the great mysteries for me.  Not sure I have had any problems related to the ground but have read many threads about grounding problems.  I usually had a blank stare....now I...

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  • Dub
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Re: Related issues?
Reply #17
Yep Jor just showed me a couple things about my 270 I wasn't sure of.

Re: Related issues?
Reply #18
I use dielectric grease on my electrical connections.  Keeps water out, and decreases corrosion. Thanks Jor for posting the ground connections.
After 20 years these connections have issues. Getting old. A wire brush and some dielectric grease can...

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Re: Related issues?
Reply #19
Any grease works fine. Dialectic does not conduct.

 Also the dash ground can work better if you drop an additional ground strap out the bottom of the dash to the frame   ground post. They are near the headlight connections.

Re: Related issues?
Reply #20
Old Foretravels had the chassis as the ground side.  Later coaches had green ground wiring run to every fixture as far as I understand

Re: Related issues?
Reply #21
Any grease works fine. Dialectic does not conduct.

 Also the dash ground can work better if you drop an additional ground strap out the bottom of the dash to the frame   ground post. They...


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