jlbayes

I have a lot of years invested into electrical diagnostics and it STILL teaches me lessons. From what I am reading you are testing the wire correctly unless I am completely overlooking something. The FASTEST way to change the circuit is run an over lay. So you would go from the obd to the pcm 3 with a new circuit. It would eliminate almost all of the potential for issue. I have seen a ton and I mean a TON of issues with the pins being pushed out of the obd connector.

Lemme know who to look for and I'll let you in.

I personally do not think you have a bad pcm. I know what the diagnostic says. The obd connector has two catch tabs on the side. Release them and it will push towards the bulk head (firewall).

Diesels are fun aren't they LOL

Whooopsss. Sorry about that the pin numbers were stuck in my head. Pins 6 and 7 were the ones you wanted. Again sorry about that and to add to your confusion. This will help; COMMUNICATION Symptom: *NO RESPONSE FROM PCM (SCI ONLY) POSSIBLE CAUSES CHECK PCM POWERS AND GROUNDS SCI TRANSMIT CIRCUIT SHORTED TO VOLTAGE TRANSMISSION CONTROL MODULE SCI RECEIVE CIRCUIT SHORTED TO VOLTAGE SCI CIRCUITS SHORTED TOGETHER SCI TRANSMIT CIRCUIT SHORTED TO GROUND SCI RECEIVE CIRCUIT SHORTED TO GROUND SCI RECEIVE CIRCUIT OPEN SCI TRANSMIT CIRCUIT OPEN GROUND CIRCUITS AT DLC OPEN POWERTRAIN CONTROL MODULE TEST ACTION APPLICABILITY 1 Perform the symptom Checking PCM Power and Ground Circuits in the Driveability category. Did the vehicle pass this test? All Yes → Go To 2 No → Repair as necessary. Perform POWERTRAIN VERIFICATION TEST VER - 1. 2 Turn the ignition off. Disconnect the PCM C3 harness connector. Disconnect the DRBIIIt from the DLC. Measure the resistance between ground and the SCI Transmit circuit. Is the resistance below 5.0 ohms? Yes → Go To 3 No → Go To 4 3 Turn the ignition off. Disconnect the TCM harness connector (if equipped). NOTE: If vehicle is not equipped with a TCM, answer yes to the question. Measure the resistance between ground and the SCI Transmit circuit. Is the resistance below 5.0 ohms? Yes → Repair the SCI Transmit circuit for a short to ground. Perform POWERTRAIN VERIFICATION TEST VER - 1. No → Replace the Transmission Control Module. Perform POWERTRAIN VERIFICATION TEST VER - 1. 44 COMMUNICATION TEST ACTION APPLICABILITY 4 Turn the ignition off. Disconnect the DRBIIIt from the DLC. Disconnect the PCM harness connectors. Turn the ignition on. Measure the voltage of the SCI Transmit circuit at the DLC connector. Is the voltage above 1.0 volt? Yes → Repair the SCI Transmit circuit for a short to voltage. Perform POWERTRAIN VERIFICATION TEST VER - 1. No → Go To 5 5 Turn the ignition off. Disconnect the DRBIIIt from the DLC. Disconnect the PCM harness connectors. Turn the ignition on. Measure the voltage of the SCI Receive circuit at the DLC connector. Is the voltage above 1.0 volt? Yes → Repair the SCI Receive circuit for a short to voltage. Perform POWERTRAIN VERIFICATION TEST VER - 1. No → Go To 6 6 Turn the ignition off. Disconnect the DRBIIIt from the DLC. Disconnect the PCM harness connectors. Measure the resistance between the SCI Transmit circuit and the SCI Receive circuit at the PCM connector. Is the resistance below 5.0 ohms? Yes → Repair the short between the SCI Transmit and the SCI Receive circuits. Perform POWERTRAIN VERIFICATION TEST VER - 1. No → Go To 7 7 Turn the ignition off. Disconnect the PCM C3 harness connector. Disconnect the DRBIIIt from the DLC. Measure the resistance between ground and the SCI Receive circuit. Is the resistance below 5.0 ohms? Yes → Repair the SCI Receive circuit for a short to ground. Perform POWERTRAIN VERIFICATION TEST VER - 1. No → Go To 8 8 Turn the ignition off. Disconnect the PCM C3 harness connector. Disconnect the DRBIIIt from the DLC. Measure the resistance of the SCI Receive circuit between the PCM C3 connector and the DLC. Is the resistance below 5.0 ohms? Yes → Go To 9 No → Repair the SCI Receive circuit for an open. Perform POWERTRAIN VERIFICATION TEST VER - 1. 45 COMMUNICATION *NO RESPONSE FROM PCM (SCI ONLY) — Continued TEST ACTION APPLICABILITY 9 Turn the ignition off. Disconnect the PCM C3 harness connector. Disconnect the DRBIIIt from the DLC. Measure the resistance of the SCI Transmit circuit between the PCM C3 connector and the DLC. Is the resistance below 5.0 ohms? Yes → Go To 10 No → Repair the SCI Transmit circuit for an open. Perform POWERTRAIN VERIFICATION TEST VER - 1. 10 Turn the ignition off. Disconnect the DRBIIIt from the DLC. Disconnect the negative battery cable. Measure the resistance between ground and both ground circuits at the DLC. Is the resistance below 5.0 ohms for each measurement? Yes → Go To 11 No → Repair the ground circuit that measured above 5.0 ohms for an open. Perform POWERTRAIN VERIFICATION TEST VER - 1. 11 If there are no possible causes remaining, view repair. All Repair Replace and program the Powertrain Control Module in accordance with the Service Information. Perform POWERTRAIN VERIFICATION TEST VER - 1.

Correct 12v DC. The readings will help us try and better help you understand as well.

Don's injectors really muddy the waters as he tends to favor smaller hole size. However they work extremely well in a 24v. Both ppump and vp fed. I have no doubts you will be happy with whatever he sends you. Infinite and Haley are just my go to's. I communicate with both on a regular basis. And a "200hp" injector is not that big in the scope of things, imo. @Me78569 is catching on as to why I like bigger than most. Boy that last statement could take a turn. Good thing I did not say it on fb lmao

Mine takes a RIDICULOUS amount of time to cool down with a stainless manifold. 350* mani temp is cool enough to shut down.

Correct. You should not see any where near 12v on either line. Again this is per my cheat sheet, they should equal 5v when added together. Let's make this simple. Red lead to pin 4 or 5, black lead to chassis ground OR one of the ground pins in the obd connector. What are your measurements? Exact readings.

My cheat sheet for sci says when added together they equal 5v.

Not my group fyi lol

Yes. They fit the 2nd gen interior much better than the autometers. Not a fan of the isspros. Just not my thing.

I am not sure where the signal ground came from but both pins 4 & 5 go to chassis ground G105 from splice S126.

I have seen the Hewitts in person I really liked them. I have autometers in both trucks right now.

There are led retro fits. Which would be acceptable. The plug and play is what I am after.

Should have been more specific. No pnp led headlights or fogs.

Chassis ground. Communication lines DO NOT terminate at chassis ground. They terminate in the module.

The electronic flashers should be the only thing you need. Do not mess with the resistors. Also...NO LED headlights or fogs.

Run an overlay from the pdc to the ecm. Will be the fastest way to eliminate the circuit.

I will be going to Hewitt gauges.

Yesssss more shaking!

Burn it. I'll bring mine.

The connector you have is pinned for the 9007 vs. the 9004 the 2nd gen uses. Move the two pins as needed. Had to on my 97.

The Quadzilla and then the Smarty mm3 & udc pro. Which smarty has been less than transparent about anything the sell.

As I said, I have a stainless diesel. http://www.stainlessdiesel.com/index.php?route=product/category&path=39