Hello Blazer Gurus!! I've been lurking here for the past few weeks and am thoroughly impressed with the knowledge available at this site. My fuel gauge is pegged all the way to the right even when no fuel is in the tank and i read on the site that this is a ground problem with the line from the sending unit. I traced the wire to the break and realize i need to replace it from the tank to midway up the frame. My question is how does the wire connect to the sending unit - is there a connector at the tank or does the wire connect directly to then sending unit necessitating removal of the tank? Thanks for any help. Take care.
CK5
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Help with fuel gauge issue...
- Thread starter guitarman
- Start date
guitarman said:
The wire was soldered to a tab on the sending unit, at the factory, IIRC.
Because even my big 100W gun wouldn't heat it well and I refuse to use a propane torch near a gas tank, I ended up drilling a small hole in the tab and using a crimp connector to ground to it, seemed to work okay.
-- A
i took bare wire and small hose clamp to one line on sender. worked great for cheep fix.
Yes, your sending wire is grounded making the gauge peg to the full side. IIRC the wire does have a plug so simply unplug the wire and make a new one with the correct termination so you can plug it back onto the sender then do a good solder connection to the remaining wire and use heat shrink tubing when you're done.
readymix
3/4 ton status
4X4HIGH said:
Actually an OPEN in the circut will cause the gauge to read "FULL" and a short will cause the gauge to read "EMPTY
Well that's funny because every truck and car for that matter on a GM vehicle if you pull the wire and ground it the gauge would read full not empty.
readymix
3/4 ton status
maybey on the newer ones. But I guarentee that if you go unplug your sender the gauge will read over full on the CBS and OBS Chevys, and if you short the wire to ground it will read empty.
0 to 90 ohm senders read full when you ground the sending wire..
Thank you, i knew someone would chime in eventually with the required info as to the correct answer. 
readymix
3/4 ton status
I always though that.
0 Ohms = Empty
90 Ohms = Full
I'll research it a little more and post up what I find....
0 Ohms = Empty
90 Ohms = Full
I'll research it a little more and post up what I find....
Make it easy, go pull your sender wire and ground it and watch the gauge peg full. 
readymix
3/4 ton status
No battery in the truck...
When I was stationed in great Lakes I had an Open in the Fuel Sender windings. This caused the gauge to read more than full. When I shorted the sender wires together it moved the gauge to empty.
When I was stationed in great Lakes I had an Open in the Fuel Sender windings. This caused the gauge to read more than full. When I shorted the sender wires together it moved the gauge to empty.
it was probably a 240 to 33....
readymix
3/4 ton status
0 - 90 is what I replaced it with. Works fine now.
I thought the 240's were Ford specific...
I thought the 240's were Ford specific...
gm is 0-90 ohms. ford is the odd ball one.
any time i found over full it was open wire.
any time i found over full it was open wire.
