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Fuel & Temp Gauge reads high when lights on : 71 Dart #1998951
01/26/16 12:37 PM
01/26/16 12:37 PM
Joined: Jan 2003
Posts: 1,620
MA
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ragtop Offline OP
top fuel
ragtop  Offline OP
top fuel
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Joined: Jan 2003
Posts: 1,620
MA
When I put my headlights on, the fuel and temp gauge slowly increase approx. 10% higher. When I shut them off, the two gauges will slowly go back to normal. Any reasons? Thanks.

Re: Fuel & Temp Gauge reads high when lights on : 71 Dart [Re: ragtop] #1998974
01/26/16 01:08 PM
01/26/16 01:08 PM
Joined: Dec 2014
Posts: 5,936
ohio
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ruderunner Offline
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ruderunner  Offline
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Joined: Dec 2014
Posts: 5,936
ohio
Sounds like a dash or body ground problem.


Angry white pureblood male
Re: Fuel & Temp Gauge reads high when lights on : 71 Dart [Re: ragtop] #1999004
01/26/16 02:11 PM
01/26/16 02:11 PM
Joined: Jan 2004
Posts: 9,066
Eugene, Oregon
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minivan Offline
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minivan  Offline
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Joined: Jan 2004
Posts: 9,066
Eugene, Oregon
I had been fighting this on my 67.. I installed a new dash voltage reducer and it seems to have fixed it.. I say "seems to" because I do not have a lot of time driving it since the new parts..
My temp gauge is still acting up and I am going to try a new thermostat there...


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Last edited by minivan; 01/26/16 02:13 PM.
Re: Fuel & Temp Gauge reads high when lights on : 71 Dart [Re: ragtop] #2001003
01/29/16 04:50 AM
01/29/16 04:50 AM
Joined: Feb 2003
Posts: 4,807
Castlegar, BC, Canada
That AMC Guy Offline
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That AMC Guy  Offline
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Joined: Feb 2003
Posts: 4,807
Castlegar, BC, Canada
Add a couple new grounds. I chased plenty of issues with my '71 that I had a long time ago. I got fed up and added a new ground to either side of the cluster. (This is the standard dash with the strip speedometer, right?)


Bloody Mary, Full of Vodka, Blessed art thou among cocktails....







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