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Instrument cluster light and fuel gauge issue #3086056
10/14/22 04:01 PM
10/14/22 04:01 PM
Joined: Jul 2015
Posts: 277
Chicago adjacent
WS68SSC Offline OP
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WS68SSC  Offline OP
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Joined: Jul 2015
Posts: 277
Chicago adjacent
I recently changed my fuel gauge because the needle kept moving past F after the car started. (1968 Dodge Dart)

After I reinstalled the instrument cluster I noticed that the dash lights do not turn on, the left turn signal indicator light is permanently on (not flashing). and the fuel gauge is needle is still buried past the F still.

Has anyone experience this issue? Bad ground possibly?

I purchased a new voltage limiter and dash light bulbs which came with new sockets also. I am going to replace everything tonight. Just thought I would see if there was something else that I might have missed.

Thanks for the help moparts!

Re: Instrument cluster light and fuel gauge issue [Re: WS68SSC] #3086059
10/14/22 04:27 PM
10/14/22 04:27 PM
Joined: Mar 2003
Posts: 5,193
NEW JERSEY
AARCONV Offline
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AARCONV  Offline
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Posts: 5,193
NEW JERSEY
full mark will mean that the power wire is broken or grounded between the gauge and the sender, check that separately before you tackle the cluster lights

Re: Instrument cluster light and fuel gauge issue [Re: AARCONV] #3086070
10/14/22 05:15 PM
10/14/22 05:15 PM
Joined: Jan 2003
Posts: 32,361
Grand Prairie,Texas
stumpy Offline
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stumpy  Offline
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Posts: 32,361
Grand Prairie,Texas
Cluster grounds through the mounting screws.

Re: Instrument cluster light and fuel gauge issue [Re: stumpy] #3086106
10/14/22 08:07 PM
10/14/22 08:07 PM
Joined: Feb 2003
Posts: 8,566
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Andrewh Offline
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Andrewh  Offline
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lights are independent of the gauges.
they feed through the light switch.

vr for the cluster does the temp and fuel gauge, so it is unlikely to be the problem.

the light that stays on is probably a ground issue, or backfeed issue somewhere else.

it may be 3 different things.

I agree, check for a pinched wire for the fuel gauge.
make sure your dimmer is turned up for the dash lights.
recheck your grounds /screws for the light that is still on.

Re: Instrument cluster light and fuel gauge issue [Re: Andrewh] #3087944
10/20/22 09:28 PM
10/20/22 09:28 PM
Joined: Jul 2015
Posts: 277
Chicago adjacent
WS68SSC Offline OP
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WS68SSC  Offline OP
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Joined: Jul 2015
Posts: 277
Chicago adjacent
Replaced the bulbs, voltage limiter, checked for pinched lines, and checked that ground screws. Still the same issue.

Re: Instrument cluster light and fuel gauge issue [Re: WS68SSC] #3087980
10/21/22 03:48 AM
10/21/22 03:48 AM
Joined: Dec 2009
Posts: 19,120
in a cattle trailer down by th...
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Guitar Jones Offline
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in a cattle trailer down by th...
The sender may be bad. A full reading on the gauge would be near 0 ohms from the sender. Something is grounded, either the wire or the sender. As for the dash lights, check you fuses and all the other bulbs. I have seen were a park lamp filament lays across a turn signal/brake light filament and causes weird backfeeds.


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Re: Instrument cluster light and fuel gauge issue [Re: Guitar Jones] #3087995
10/21/22 07:21 AM
10/21/22 07:21 AM
Joined: Jan 2003
Posts: 9,868
North Dakota
6PakBee Offline
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6PakBee  Offline
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North Dakota
If you suspect a pinched wire to the gas tank sender, pull the IVR and the connection to the sender and take a resistance test between the sender wire and ground.


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Re: Instrument cluster light and fuel gauge issue [Re: 6PakBee] #3088042
10/21/22 11:20 AM
10/21/22 11:20 AM
Joined: Jan 2003
Posts: 13,459
Omaha Ne
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TJP Offline
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Omaha Ne
I'll agree you may have 2 or 3 issues but if I understand correctly you started with 1 being the fuel gauge. So I would back track and try to figure out what is causing the other two issues which sound A LOT like a ground problem. Once that is resolved I would go back to the fuel gauge which again, I'll agree sounds like a grounded sending connection or wire. One can disconnect the wire at the sending unit or preferably at either the rear harness connector or instrument panel connector until the other two issues are resolved. Doing so will also allow you to ohm out each section of the harness.
Might also wat to look at this post
https://board.moparts.org/ubbthread...temperature-gauge-issue.html#Post3086628

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