Tyson Josh Posted yesterday at 03:15 PM Share Posted yesterday at 03:15 PM Recently I have been doing some fixing on my 87 Comanche. Inline 6. 4x4. Long bed. Automatic. I replaced passing gear cable , installed electric fans and removed manual fan. New plugs, wires , rotor, and distributor cap. New oil and filter. ( Not a fram) My oil light has come on . I went through my book it's a Haynes and there's nothing in there defining like where my sending unit or signal comes from I'm not very sure on how to check my oil pressure because it's just a dummy light on the dash so I know how to work on cars and I'm somewhat savvy with it but I'm not very electrical familiar any help would be appreciated where to start what to look at. Link to comment Share on other sites More sharing options...
jdog Posted yesterday at 03:23 PM Share Posted yesterday at 03:23 PM Verify the senders hooked up, it is next to the oil filter or right below it Link to comment Share on other sites More sharing options...
89 MJ Posted yesterday at 03:25 PM Share Posted yesterday at 03:25 PM The passenger side of the block near the oil filter is where the sender is. Pull that sender and verify with a mechanical gauge to know what your pressure actually is. How long did you run it for? The oil filter needs to fill up to build oil pressure, but that should only take a few seconds. What kind of oil did you use? These trucks called for 10W30 when new, make sure you used something at least that thick. Link to comment Share on other sites More sharing options...
Tyson Josh Posted yesterday at 03:45 PM Author Share Posted yesterday at 03:45 PM I did look for the sender. There is not one by the oil filter. There is a brass fitting there and a port that is plugged off where one , I believe, should be . But there is nothing there. Link to comment Share on other sites More sharing options...
Tyson Josh Posted yesterday at 03:47 PM Author Share Posted yesterday at 03:47 PM I use 10w30 high mileage full synthetic Castrol. I let the truck run 3 or 4 min. Link to comment Share on other sites More sharing options...
89 MJ Posted yesterday at 03:54 PM Share Posted yesterday at 03:54 PM Ok. Sounds like your oil light is caused by not having the sender in it. That’s a pretty easy fix. Link to comment Share on other sites More sharing options...
llhat Posted 21 hours ago Share Posted 21 hours ago do you see the connector? Is it unplugged? I cannot recall if the sender grounds out when zero pressure, illuminating the light... but that may be the case. Link to comment Share on other sites More sharing options...
Gojira94 Posted 6 hours ago Share Posted 6 hours ago If you have a round pigtail with an offset single blade terminal, Wells PS117 is available at most parts stores. Autozone re-packages it as Duralast red/blue box. $10.00. PS117 Link to comment Share on other sites More sharing options...
Tyson Josh Posted 2 hours ago Author Share Posted 2 hours ago I could not find any thing around the filter or distributor. I know the book shows there to be one but mine does not. I have had the truck for 10 years. Never had the light come on before. Could it be on the other side of the motor? Truly has me stumped. have not been able to find any diagrams that might label what I'm looking for Link to comment Share on other sites More sharing options...
Tyson Josh Posted 2 hours ago Author Share Posted 2 hours ago I will look for this pig tail this evening after work. Link to comment Share on other sites More sharing options...
Tyson Josh Posted 2 hours ago Author Share Posted 2 hours ago I have not found anything unplugged or dangling wire harness .... Link to comment Share on other sites More sharing options...
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