Replace the ignition switch.
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Originally Posted by geo1
(Post 362854)
And, what year,etc. is the vehicle,I'll get in the book, otherwise, AutoZone has many electrical diagrams,they and all data are same,the latter is a paid for service,much more info
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Also,that is fuel pump relay power, disconnect?
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Originally Posted by geo1
(Post 362863)
Also,that is fuel pump relay power, disconnect?
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When the key is on it says check gages and the battery light is on.
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Last post,key on,normal,looking further,that fuse powers relay center,so back to pulling relays,or inspecting wires leaving relay center,and the sensors you mentioned above,power comes from pcm,so the problem is before that, except o2 heater circuit
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Originally Posted by kevinkpk
(Post 362860)
Replace the ignition switch.
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Can't find in book,does that 5.7 have a oil pressure sending unit on side of block,3 wire connector, disconnect that for a test,on older models it's tied into fuel pump,12v is there,and if it internally grounds, problem
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Originally Posted by geo1
(Post 362880)
Can't find in book,does that 5.7 have a oil pressure sending unit on side of block,3 wire connector, disconnect that for a test,on older models it's tied into fuel pump,12v is there,and if it internally grounds, problem
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Alright, today my van is cranking up no problem. I think some wiring got wet some how. I put a new hose clamp on radiator in case it is leaking under pressure. I did notice a wiring harness going into the transmission (which is a 4l80e) that is leaking fluid into the electrical connector. It's possible that the plug dried out when it was disconnected.
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