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Testing and adjustment of a 56 Mopar Suburban (wagon) fuel gauge Jump to page : 1 Now viewing page 1 [50 messages per page] | View previous thread :: View next thread |
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56D500boy |
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Expert 5K+ Posts: 9854 Location: Lower Mainland BC | . For whatever reasons, the fuel sender and fuel gauges for the 55-56 Mopar wagons are different than those of the sedans. For the sedans (non-wagons), the gauge has two wires and the sender has one. For the wagons, the gauge has three wires and the sender, two wires. As a result the gauge and sender are unique to the wagons. The upside is the gauge can be calibrated. Here is some information borrowed from the 1955-56 Plymouth and 56 Chrysler Factory Service Manuals (FSMs) that discusses the wiring, testing and calibration of the gauge. First some info from the 56 Chrysler FSM: Now more 56 Plymouth (as an example) info: Edited by 56D500boy 2021-12-07 5:57 PM (56PlymouthInstrumentsAndAccessoriesWiringDiagram.jpg) (1622622_56PlymouthFuelGauge_1.jpg) (1622622_56PlymouthFuelGauge_2.jpg) (1622622_56PlymouthFuelGauge_3.jpg) (1641679_56PlymouthSuburbanFuelLevelSender.jpg) (ThermostaticFuelGaugeInfo_1.jpg) (ThermostaticFuelGaugeInfo_2.jpg) (ThermostaticFuelGaugeInfo_3.jpg) (ThermostaticFuelGaugeInfo_4.jpg) Attachments ---------------- 56PlymouthInstrumentsAndAccessoriesWiringDiagram.jpg (70KB - 122 downloads) 1622622_56PlymouthFuelGauge_1.jpg (220KB - 129 downloads) 1622622_56PlymouthFuelGauge_2.jpg (184KB - 121 downloads) 1622622_56PlymouthFuelGauge_3.jpg (144KB - 124 downloads) 1641679_56PlymouthSuburbanFuelLevelSender.jpg (68KB - 125 downloads) ThermostaticFuelGaugeInfo_1.jpg (181KB - 125 downloads) ThermostaticFuelGaugeInfo_2.jpg (155KB - 122 downloads) ThermostaticFuelGaugeInfo_3.jpg (149KB - 122 downloads) ThermostaticFuelGaugeInfo_4.jpg (135KB - 124 downloads) | ||
westaus29 |
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Veteran Posts: 147 Location: Mandurah, Western Australia | You must be a mind reader!! The last few days I have been meaning to post a query about this same subject. I have a 55 Plymouth wagon which has been converted from original 6v to 12v. The fuel gauge and sender were both faulty when I got it so I replaced gauge and sender with a 2 part dcpd replacement that uses only a single wire but that goes from full to empty when still 3/4 full. I have now fixed the original sender and purchased a new original gauge and before installing am trying to work out how to handle the voltage change as both 55 and 56 use the same part numbers. I have the 55 manual and it has the info you have posted but need to review the 56 info. Thanks for what you have posted, will check and see how I go. I presume Plymouth and Dodge have same part numbers? Will post what I have. Jim | ||
56D500boy |
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Expert 5K+ Posts: 9854 Location: Lower Mainland BC | westaus29 - 2021-12-07 4:58 PM Thanks for what you have posted, will check and see how I go. I presume Plymouth and Dodge have same part numbers? Will post what I have. I don't fully understand why the 55 6V and 56 12V Plymouth senders and gauges are the same but it seems they are. And they are the same for both 55-56 Plymouths and Dodges. 1622 622 Gauge (note: Note 1 relates to a filter (a 5 Micro Farad capacitor to remove "noise" from the gauge points opening and closing, interferring with the radio signal "NOTE 1: For 1956 model specify 1-1571 839 Filter" 1641 679 Sender: Here you can see the instructions regarding the addition of the filter if the wagon was equipped with a radio. Good Luck Jim Edited by 56D500boy 2021-12-08 10:41 AM (1571839_SuburbanFuelGaugeRadioInterferenceSuppressor.jpg) (1571839_ElectricalNoiseFilter_1.jpg) (1571839_ElectricalNoiseFilter_2.jpg) Attachments ---------------- 1571839_SuburbanFuelGaugeRadioInterferenceSuppressor.jpg (176KB - 124 downloads) 1571839_ElectricalNoiseFilter_1.jpg (237KB - 119 downloads) 1571839_ElectricalNoiseFilter_2.jpg (232KB - 122 downloads) | ||
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