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Electrical Discussion of preventative/corrective maintenance and other technical issues regarding your coach's electrical system.

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  #11  
Old 09-18-2020
Tom and Erin Tom and Erin is offline
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Probably, and somewhere you can’t get to as well. The wires to the sender at the tank are pretty well insulated, at least mine were though. Maybe a short or loose wire at the gauge or behind the panel perhaps. For what it’s worth, the WEMA senders are really nice, all stainless for marine use. Vertical float as well so no messing around with the float arm bs. Not super expensive either, $60 ish.
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  #12  
Old 09-18-2020
D. Troit D. Troit is offline
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Well I would sure like to be more confident that the issue was my sending unit before I tear up the tile floor to change it out. The gauge pegging to full (not to empty) seems like an odd way for the sending unit to malfunction.
I'm going to poke around behind the dash, and see if I can find something amiss there first.
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Robert Murdock
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  #13  
Old 09-18-2020
Tom and Erin Tom and Erin is offline
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I suppose you could disconnect the sender lead at the gauge and hook it up to a test lamp or analog voltmeter. That should isolate the wiring to the tank and the sender together. Not sure there is a good way to isolate the wiring and sender from each other without accessing the top of the tank.
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  #14  
Old 09-18-2020
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chiplamb chiplamb is offline
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Quote:
Originally Posted by D. Troit View Post
If I take the wires off the sending unit at the tank and tape them up, my gauge should read empty. Correct?
And if I go for a drive with the wires disconnected and then the fuel gauge continues to occasionally peg to full, wouldn't that indicate a short to ground?
Correct
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Chip Lamb
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  #15  
Old 09-18-2020
cinerama3 cinerama3 is online now
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Mr. Troit, my gauge did the same thing. Pegged. It was a bad sender.
Just to confirm, I hooked a potentiometer to the wires at the sender, and got full range on the gauge.
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Indianapolis, IN
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  #16  
Old 09-18-2020
D. Troit D. Troit is offline
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Thank you all for the replies.
That a 35 year old sending unit would go bad is no surprise. I'll change it out if I can not find another reason for my gauge acting like it does. Still, I dread tearing into the ceramic tile to do so. The coach is in excellent original condition, and I aspire to keep it that way as much as possible.
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  #17  
Old 09-18-2020
andywojteczko andywojteczko is offline
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If you have an intermittent or open ground connection the gauge will peg full.
Check for a bad ground at the sender.


Andy
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