Fuel sending unit question for Wilcox
Thread Starter
Burning Brakes
Joined: Jan 2010
Posts: 884
Likes: 84
From: New Boston, NH
Fuel sending unit question for Wilcox
So, I have a 75, with a fuel gauge pegged past full. I know that I have less that 5 gallons in the tank (bladder has been removed). In reading your write up on diagnosing fuel gauge issues, it seems that my issue may lie in the sending unit itself. My question is, when checking the post on the sending unit that the sending wire connects to for ohms, do I touch both leads from my multimeter to the post? The instruction manual for my meter says to put one lead on each side of the circuit, but how does that work with that tiny little post? I appreciate any advice that you can give.
Thanks,
Bryan
Thanks,
Bryan
Race Director
Joined: May 2006
Posts: 18,737
Likes: 2,583
remove the wire from the post and ground the wire, your gauge should go to empty. If it doesnt go to empty you have a problem with the signal coming from the gauge. If it does go to empty check the ground connection from the sender to the frame, if it is good, you have a bad sender.
Concerning your multi meter test above one wire goes to the post and the other wire to a good ground.
Concerning your multi meter test above one wire goes to the post and the other wire to a good ground.
Last edited by MelWff; Feb 25, 2017 at 04:01 PM.
Thread Starter
Burning Brakes
Joined: Jan 2010
Posts: 884
Likes: 84
From: New Boston, NH
remove the wire from the post and ground the wire, your gauge should go to empty. If it doesnt go to empty you have a problem with the signal coming from the gauge. If it does go to empty check the ground connection from the sender to the frame, if it is good, you have a bad sender.
Concerning your multi meter test above one wire goes to the post and the other wire to a good ground.
Concerning your multi meter test above one wire goes to the post and the other wire to a good ground.
Bryan
Former Vendor
Joined: Aug 2006
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From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Thanks Mel. After your reply, I went back and re-read the Wilcox paper on this and it all made sense. Seems that the sending unit was good and that the issue was just a bad connection of the wire to the sending unit post. Problem solved and gauge working as it should. Thanks for the help.
Bryan
Bryan
I search for threads with Willcox, not Wilcox...
So I missed this post. There are two L's in Willcox... 
Ernie
Thread Starter
Burning Brakes
Joined: Jan 2010
Posts: 884
Likes: 84
From: New Boston, NH
Bryan
