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Broken fuel guage #2524304
07/19/18 11:42 PM
07/19/18 11:42 PM
Joined: Jul 2013
Posts: 21
USA
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z70dodge Offline OP
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z70dodge  Offline OP
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Fuel gague has never worked since I have had the car. How do you test that solenoid looking thing in the guage itself? What should I do to test ? 1970 Dodge Challenger

Re: Broken fuel guage [Re: z70dodge] #2524355
07/20/18 02:14 AM
07/20/18 02:14 AM
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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RapidRobert Offline
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Lincoln Nebraska
I would disconnect the 2 wires from the gauge & ohm the gauge terminals & see if you have basic continuity. First tho (& way easier) I would pull the blue wire "L" connector off of the tank sender & ground the connector (key on) to a CONFIRMED good ground & see if the gauge needle swings over to the "F" side.


live every 24 hour block of time like it's your last day on earth
Re: Broken fuel guage [Re: z70dodge] #2524468
07/20/18 11:59 AM
07/20/18 11:59 AM
Joined: Feb 2003
Posts: 8,657
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Andrewh Offline
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Andrewh  Offline
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I am guessing you have rally gauges, and the voltage reg is built into the fuel gauge.
If your temp gauge works then it is probably fine.

if it doesn't then you check for pulsing lights on a test light. or a digital volt meter would show 5 volts.

you can test your gauge by wiring 2 AA batteries together in series to get 3 volts and touch the ends to the pos and neg of the gauge to see if it moves.

typically it will be the sending unit, and you can test that as robert spells out above.

Re: Broken fuel guage [Re: z70dodge] #2524500
07/20/18 01:02 PM
07/20/18 01:02 PM
Joined: Jan 2003
Posts: 21,050
Niles , Ohio
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therocks Offline
oh wait.but hey.lets see.oh yeah.
therocks  Offline
oh wait.but hey.lets see.oh yeah.
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Niles , Ohio
Id say 99 % of the timeits the sender.Almost every fuel gauge problem is there.Mostly are bad floats and second is the sender itself.Easy to check.Inhook the wire to sender.Attach a ggod ground to the wire and turn on key if gauge moves its in the sender.Ifnot as said check t see if it pulses to sender.The other big problem is the ground for the sender.many have rusted awy and lots have lost continuity.Oh yeah if your car get a service manual.Rocky


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Re: Broken fuel guage [Re: z70dodge] #2524797
07/20/18 11:35 PM
07/20/18 11:35 PM
Joined: Jul 2013
Posts: 21
USA
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z70dodge Offline OP
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Thanks everyone I will check it out







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