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04-22-2017, 02:48 PM
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#1
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Name: 06Bigblue
Title: Diesel Enthusiast
Status: Not Here
Join Date: Jun 2011
Location: mayfield, ny
Member`s Gallery
Posts: 104
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Fuel gauge issue
I have a 06 with a fass 260 on it and all of a sudden my fuel gauge reads doesn't read and the fuel light is on. I checked fuses, anyone have any ideas before I drop the tank and replace the sending unit
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04-25-2017, 05:13 AM
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#2
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Name: SixOhh
Title: EPA unfriendly
Status: Not Here
Join Date: Aug 2008
Location: Magnolia, TX
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Posts: 1,108
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time to drop the tank or pull the bed. sending unit or wiring.
and just so you know 06's are known for bad clusters but you would have other symptoms i.e. the christmas tree effect
__________________
07' Silver 2500 5.9 4x4 LWB
Goerend 48re-csp5/EFI- T&C Mild Cp3-F1 Apex 7.5 -S369sxe Amsoil
Coolant Bypass -Airdog-D&J- Hamilton 188/220 -AFE-ARP Opti-Lube
H-Town Off-Road
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04-26-2017, 09:48 PM
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#3
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Name: Jballou
Title: FNG
Status: Not Here
Join Date: Feb 2012
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Posts: 28
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Do a gauge sweep test, that rules out the gauges. Press and hold trip distance button, turn the key on, wait until the gauges all ratchet sweep. Report back here.
__________________
04, 4x4 short bed 4 door, 48re with 3 disc DPC, billet input, intermediate. HPt by Firepunk. Exergy BMS 50hp
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04-30-2017, 11:54 AM
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#4
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Name: 06Bigblue
Title: Diesel Enthusiast
Status: Not Here
Join Date: Jun 2011
Location: mayfield, ny
Member`s Gallery
Posts: 104
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The gauge sweep test worked great I'm going to check for power at the sending unit if there's power there I'll order a new sending unit
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05-06-2017, 10:25 AM
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#5
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Name: 06Bigblue
Title: Diesel Enthusiast
Status: Not Here
Join Date: Jun 2011
Location: mayfield, ny
Member`s Gallery
Posts: 104
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No power at the plug for the sending unit or the plug underneath the driver's door. Anyone have any experience with this headache
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05-06-2017, 04:14 PM
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#6
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Name: Jballou
Title: FNG
Status: Not Here
Join Date: Feb 2012
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Posts: 28
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What about the plug on the firewall? Sits just to the passenger side of the master cylinder. Check the wiring where. The ecm has to see the connection unplugged to send the full voltage.
__________________
04, 4x4 short bed 4 door, 48re with 3 disc DPC, billet input, intermediate. HPt by Firepunk. Exergy BMS 50hp
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05-06-2017, 04:16 PM
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#7
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Name: Jballou
Title: FNG
Status: Not Here
Join Date: Feb 2012
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Posts: 28
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Then the next place to look is at the ECM. It controls the gauge via the BUSS line, reads the level via the B/W wire.
__________________
04, 4x4 short bed 4 door, 48re with 3 disc DPC, billet input, intermediate. HPt by Firepunk. Exergy BMS 50hp
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05-06-2017, 08:55 PM
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#8
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Name: smokinVE
Title: $$+VE=NO HP
Status: Not Here
Join Date: Aug 2011
Location: Desart
Member`s Gallery
Posts: 1,731
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Isn't it resistance? I don't know Dodge stuff very well but every level sensor I've ever seen was a resistance.
__________________
93D350, VE powered, slow but reliable:-))
Quote:
Originally Posted by jasonc
I don't think they let hair sniffer twit much. Or the little gay guy. Only the Indian does.
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05-10-2017, 06:07 PM
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#9
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Name: Jballou
Title: FNG
Status: Not Here
Join Date: Feb 2012
Member`s Gallery
Posts: 28
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^
Yes it is resistance based. The ECM interprets the voltage resistance and then controls the gauge.
__________________
04, 4x4 short bed 4 door, 48re with 3 disc DPC, billet input, intermediate. HPt by Firepunk. Exergy BMS 50hp
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05-10-2017, 10:58 PM
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#10
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Name: smokinVE
Title: $$+VE=NO HP
Status: Not Here
Join Date: Aug 2011
Location: Desart
Member`s Gallery
Posts: 1,731
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WHAT!? Voltage resistance, WTF is that!? Check resistance at the fuel tank, I'm guessing it'll show OL. Ground the wire make sure the cluster moves. Order a new level sensor, rock the bed/drop the tank replace level sensor. Side thought, any wrecks/heavy off reading lately? I've seen in tank modals break and cause this.
Quote:
Originally Posted by Jballou
^
Yes it is resistance based. The ECM interprets the voltage resistance and then controls the gauge.
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__________________
93D350, VE powered, slow but reliable:-))
Quote:
Originally Posted by jasonc
I don't think they let hair sniffer twit much. Or the little gay guy. Only the Indian does.
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05-22-2017, 07:27 PM
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#11
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Name: 06Bigblue
Title: Diesel Enthusiast
Status: Not Here
Join Date: Jun 2011
Location: mayfield, ny
Member`s Gallery
Posts: 104
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Thanks for the ideas guys, I know it reads resistance, no wrecks but while sled pulling it has had a bad habit of hopping like crazy. Maybe that broke it.
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