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  • Gas Gauge quits working when I turn on lights



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    1. 07-23-2018, 08:19 PM #1
      RazorbackGT
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      Default Gas Gauge quits working when I turn on lights

      The gas gauge drops to E whenever I turn the lights on. Anyone run into this before? Could it be the printed ribbon circuit?

      Thanks
      Brant
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    2. 07-23-2018, 09:25 PM #2
      Mustang-junky
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      I'd start by making sure everything is grounded correctly. Missing grounds can make weird stuff happen.

      Jess
      Previously owned;
      1979 Mustang, v6 swapped to EFI 393, custom installed m122 blower, 4r70w trans, Megasquirt II, T-top swaped in.
      1990 Mustang, 545 BBF, C-4 with brake, ladder bars.
      1983 Mustang, 1984 SVO Mustang
      1984 Mustang convertible, v6 swapped to 351
      1986 Mustang GT, 1989 Mustang GT convertible
      1992 Mustang coupe, 4 swapped to 302
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    3. 07-23-2018, 11:54 PM #3
      KevinK
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      IVR.... the alternator output probably changes.
      Fox Body/3rd Gen MCA Gold Card Judge
      84 SVO 24K miles, 85 Mclaren Capri Vert. 84 GT Turbo Vert.
      88 Mclaren Mustang Vert 20K miles, 89 Mustang LX Sport Vert,
      03 Mach 1 7900 miles, 74 Mustang II, 69 Mustang, 67 Mustang, 07 GT500,
      14 Mustang CS/GT, 15 F150 FTX Tuscany, 16 F250 Crewcab, 67 Tbird 47K miles
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