Fuel Gauge Ground |
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Fuel Gauge Ground |
David in VA |
Jun 15 2018, 06:49 AM
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#1
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Newbie Group: Members Posts: 9 Joined: 5-June 17 From: Richmond, VA Member No.: 21,153 Region Association: MidAtlantic Region |
Does anybody know where the fuel gauge grounds? I tested my sender and it seems to be working fine, grounds are connected to the back of the gauge and it reads empty with the key off and full with the ignition on. Never goes down though, I'd like the check the ground connection but don't know where it is.
Thanks David |
914Sixer |
Jun 15 2018, 07:21 AM
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#2
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914 Guru Group: Members Posts: 8,840 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region |
Ground crown is in the upper left corner behind fuse block
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David in VA |
Jun 15 2018, 07:48 AM
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#3
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Newbie Group: Members Posts: 9 Joined: 5-June 17 From: Richmond, VA Member No.: 21,153 Region Association: MidAtlantic Region |
Got it, thanks very much.
David |
toolguy |
Jun 15 2018, 07:50 AM
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#4
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Senior Member Group: Members Posts: 1,267 Joined: 2-April 11 From: San Diego / El Cajon Member No.: 12,889 Region Association: Southern California |
all the gauges share a common BRN ground loop wire. . that the gauge will read full
should indicate the ground is good. When did the gauge work correctly last? what happened since? sounds more like a sender rheostat issue. |
David in VA |
Jun 15 2018, 08:24 AM
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#5
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Newbie Group: Members Posts: 9 Joined: 5-June 17 From: Richmond, VA Member No.: 21,153 Region Association: MidAtlantic Region |
all the gauges share a common BRN ground loop wire. . that the gauge will read full should indicate the ground is good. When did the gauge work correctly last? what happened since? sounds more like a sender rheostat issue. Thanks toolguy, I'm trying to eliminate the various components. The gauge hasn't worked since I bought the car. The previous owner put in a new gas tank and sender. I tested the sender and it seems to be working, next step is to jump the green wire that goes from the sender to the gauge and eliminate that. Does that make sense? Appreciate your help, for some reason having a fuel gauge that doesn't work really irritates me. David |
toolguy |
Jun 15 2018, 10:22 AM
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#6
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Senior Member Group: Members Posts: 1,267 Joined: 2-April 11 From: San Diego / El Cajon Member No.: 12,889 Region Association: Southern California |
3 wires at the sender. .. brn = frame ground, black = low fuel warning to dash light, green is the normal gauge wire to the gauge. . a red/white is the power at the gauge. .
For your gauge to always read full, my educated guess is your most probable cause is the float rheostat in the sender. Or the green wire is shorted to ground somewhere in the wiring harness. As the float goes up and down there should be a resistance change between the brown and green terminals on the sender, which in effect controls the needle position of the gauge. . sounds like the green wire always has full ground potential. . [zero ohms resistance] Last option = did someone rewire / reconnect the wires incorrectly on the sender unit plug?? |
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