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2004 Ram V-6 3.7 Liter. Start truck oil pressure gauge stays at zero. Shut it off and re-start and gauge works perfect. It only acts up at first start up. I purchased an oil pressure sending unit for the problem and went to replace it but then the plot thickens. Next to the oil filter is a sending unit that looks like what I bought from Dodge dealer how ever I wasn't able to get the connector off yet but there is a purple wire that goes into the end of the connector and it is cut off and wire is just hanging there I can't find the other end. If it has no wire connected then I can't see how replacing that sending unit would accomplish anything. Question is is there another sending unit and if so where is it?? Where can I find the other end of the purple wire and what is this sending unit for by the oil filter. Truck runs great no issues other than having to start it twice when I drive it. Any suggestions would be appreciated.Thanks in advance

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  • thebernieray Aug 24, 2010

    Why do you feel like it is a cluster issue. Nothing was said about the sensor wire not being hooked up?? Do you know how many and where the sensors are. There are a lot of these issues on the internet and most of them seem to be faulty sensor or loose connection. I find it funny nothing was said about the sensor not being hooked up??

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To diagnose this properly and get all the information on locations your best bet is to go to mitchell1diy online and pay the 12 bucks for the info. I doubt this is a sensor issue. Its most likely a instrument cluster or computer problem.

Posted on Aug 24, 2010

  • Susan Price Aug 24, 2010

    because your saying you have an intermittant issue, If its not hooked up how could it ever work. Your going to need to diagnose this correctly. Thats why I suggested the site. Otherwise your going to have to pay someone to do it.

  • Susan Price Aug 24, 2010


    its located where the arrow points

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