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Hi. Is this a v8 or a v6?
Nevermind. I see it is a 4.7
Do you have a test light? WIth the starter relay removed and the key ON, do you have power on pins 85 and 30 of the relay?
Hi Im David, if you have power at the appropriate places at the relay base, and it starts and runs with 30 and 87 jumpered. then the relay should be the culprit wouldnt you think? have you tried another one?
have you checked the wiring from the relay to each place it goes for high resistance shorts to ground? or the condition of the wiring i.e. corrosion producing high resistance? have you done a pull test on any wiring to make sure the pins are locked into their connectors? and not pushed back a little?
heres a print if it helps at all.
this doesnt make sense. I have to believe its the pcm. I know you replaced it. but thats the only possible thing it can be. it either needs reprogrammed, reflashed, or replaced again. did you check the grounds at the pcm area?
well you are as thorough as they come my friend. I wish there was something else I could suggest. Have checked all the voltages/grounds for the DLC?
sorry man. ive been a mechanic for 32 and I am out of thoughts. I think its going to come down to a loose ground somewhere or as mentioned the computer. i can opt out and see if another tech might have a different thought.
Different expert here.
I would like to help.
I am just reading the post to get cought up
Does the engine crank over if you supply power to the female pin 87 of the starter relay with it removed?
Ok, excellent! They is has to be a bad connection where you plug in the relay.
Unless your missing a ground going into the relay on pin 86? Is that the case?
Looking through this thread I could not see if you said that there is a ground going to this relay or not..
Right. So are you getting a ground from the solenoid pack in the transmission to the starter relay?
So all three inputs to the relay check out good correct?
NO problem. We have all been there before.
How are you checking for a ground to the relay? Can you upload some pics, video or maybe we can talk on the phone?
Ok, send some pics..
Is the relay clicking when you turn the key to the CRANK position?
Chances are you have not tested the circuit under a load. Thats when you get the most accurate test results
Let me see
I think something simple is being overlooked. I dont think your testing it correctly and therefore not getting the desired results. That's why I would like to see what your doing and how your testing it. Remember, you asked for a fresh set of eyes.
Sounds good no problem.
I will be looking forward to hearing from you.