Frank Blackstone Posted September 30, 2011 Report Share Posted September 30, 2011 what is the OHM reading of a "good working" fuel tank sending unit. I could not find it in the manual, searing the forum or in the parts for sale section. Thanks in advance. Frank Quote Link to comment Share on other sites More sharing options...
realgonekatt Posted September 30, 2011 Report Share Posted September 30, 2011 73ohms empty...10ohms full. According to the Tanks inc. chart for ordering their various sending units for their p15 tanks. I just happened to be looking at this before I saw your post..Now to make it work with my 12v system, hmmmm.. Quote Link to comment Share on other sites More sharing options...
Frank Blackstone Posted September 30, 2011 Author Report Share Posted September 30, 2011 Thanks, we must be working on the same problem or we have had a cosmic connection. Frank Quote Link to comment Share on other sites More sharing options...
realgonekatt Posted September 30, 2011 Report Share Posted September 30, 2011 Getting tired of my manual gauge ie...pull rag out of sender hole and inspect with flashlight. I got my tank from tanks inc and just noticed that they have a sending unit with stock values for $30, not a bad price. However, I am now 12v so Im thinking a runtz resistor will help marry everything. Quote Link to comment Share on other sites More sharing options...
TodFitch Posted September 30, 2011 Report Share Posted September 30, 2011 73ohms empty...10ohms full. According to the Tanks inc. chart for ordering their various sending units for their p15 tanks. I just happened to be looking at this before I saw your post..Now to make it work with my 12v system, hmmmm.. That sounds like a single wire sender. The P15 era uses a two wire sender which is quite a different beast... Quote Link to comment Share on other sites More sharing options...
Adam H P15 D30 Posted September 30, 2011 Report Share Posted September 30, 2011 Getting tired of my manual gauge ie...pull rag out of sender hole and inspect with flashlight. I got my tank from tanks inc and just noticed that they have a sending unit with stock values for $30, not a bad price. However, I am now 12v so Im thinking a runtz resistor will help marry everything. Some people say the guage work fine on 12v. I put a Runtz in mine. Got it from Speedway. Quote Link to comment Share on other sites More sharing options...
YukonJack Posted October 1, 2011 Report Share Posted October 1, 2011 Some people say the guage work fine on 12v. I put a Runtz in mine. Got it from Speedway. I used a Runtz in my 47. Worked about 3 days and burned out. Been running straight 12 volts ever since and the gauge doesn't seem to mind. Still working. Quote Link to comment Share on other sites More sharing options...
realgonekatt Posted October 1, 2011 Report Share Posted October 1, 2011 Thanks for the useful info fellas...I hate buying stuff. If I would have followed all the advice on what needs to be changed for a 12v conversion (not just here but all over the internet) I would have had to sell my car to pay for it. Most of the stock bits didnt seem to mind 12v. Quote Link to comment Share on other sites More sharing options...
bottlethrottle Posted October 2, 2011 Report Share Posted October 2, 2011 I'm also planning to get my factory fuel guage working! My car has been changed to 12v negative ground before I bouhght it. I noticed not only are the (2) wires leading to the fuel tank disconnected under the trunk cover, I stumbled across what looks like (3) wires disconnected from the guage as well..........Can anyone help me with wire colors and location and/or trick to getting my fuel guage working again! Thanks in advance, -bottlethrottle Quote Link to comment Share on other sites More sharing options...
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