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04-08-2016, 09:22 PM
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#1 |
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Registered User
Join Date: Aug 2015
Location: Kelowna, B.C, Canada
Posts: 1,747
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Sending unit and gas guage wiring
Hi everyone, the other day I tried to hook my sending unit up to my gauge. I tested it so I know the sending unit is good. First I grounded it then I hooked the brown wire that comes from the gauge to the to sending unit. Then I turned the key so it would get power and "zap" a small cloud of smoke came from the sending unit and fried it. It no longer works now. So now I got another sending unit and tested it and it works. Any ideas on what went wrong? I don't want to fry this one. Thanks
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Nik...................____ 62 lwb c10 step-side 261 5 spd .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ my build thread. Sending unit solution |
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04-09-2016, 01:09 PM
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#2 |
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Registered User
Join Date: Aug 2015
Location: Kelowna, B.C, Canada
Posts: 1,747
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Re: Sending unit and gas guage wiring
Anyone know?
__________________
Nik...................____ 62 lwb c10 step-side 261 5 spd .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ my build thread. Sending unit solution |
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04-09-2016, 04:46 PM
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#3 |
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Registered User
Join Date: Jun 2013
Location: joshua tree ca.
Posts: 1,484
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Re: Sending unit and gas guage wiring
Missed wired ? throwing voltage to the sending unit
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04-09-2016, 04:58 PM
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#4 |
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Registered User
Join Date: Apr 2014
Location: Fate, Texas ( About 35 miles east of Dallas)
Posts: 318
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Re: Sending unit and gas guage wiring
Isn't the sending unit in the gas tank?
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04-09-2016, 10:38 PM
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#5 | |
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Registered User
Join Date: Aug 2015
Location: Kelowna, B.C, Canada
Posts: 1,747
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Re: Sending unit and gas guage wiring
Quote:
__________________
Nik...................____ 62 lwb c10 step-side 261 5 spd .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ my build thread. Sending unit solution |
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04-09-2016, 10:57 PM
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#6 |
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Moderator
 Join Date: Dec 2012
Location: ON, Canada
Posts: 2,176
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Re: Sending unit and gas guage wiring
I'll guess that 12v doesn't go to it, it just gets grounded and has variable resistance to ground.
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04-10-2016, 01:15 AM
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#7 | |
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Registered User
Join Date: Feb 2015
Location: Ridgecrest, CA
Posts: 94
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Re: Sending unit and gas guage wiring
Quote:
Not sure what is happening in your specific situation Stepside. It sounds like full power went through the brown wire and hit the windings of the sending unit and smoked them. Double check your gauge wiring and test the wire with a volt meter before connecting the new sending unit. Last edited by Tazimafied; 04-10-2016 at 01:22 AM. |
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04-13-2016, 09:13 PM
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#8 |
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Registered User
Join Date: Feb 2015
Location: Ridgecrest, CA
Posts: 94
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Re: Sending unit and gas guage wiring
Very nice! Great success! What does the other brown wire go to? Doesn't sound like a factory installed wire.
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04-13-2016, 10:08 PM
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#9 | |
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Registered User
Join Date: Aug 2015
Location: Kelowna, B.C, Canada
Posts: 1,747
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Re: Sending unit and gas guage wiring
Quote:
__________________
Nik...................____ 62 lwb c10 step-side 261 5 spd .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ my build thread. Sending unit solution |
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04-14-2016, 09:57 AM
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#10 |
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Registered User
Join Date: Apr 2015
Location: Gallatin, MO
Posts: 295
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Re: Sending unit and gas guage wiring
Ha! Sounds like the same guy might have wired my truck. A 6 year old could have probably done a better job. Glad you got it worked out, and I appreciate the description of how the wiring is supposed to work. I need to look at mine as well.
When I was replacing my fuel tank's sending unit, I also realized the filler neck had been replaced with a gatorade bottle with hose clamps around each end. Talk about low budget ingenuity... |
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