lothos Posted November 27, 2011 Report Share Posted November 27, 2011 1990 Coupe deville 4.5. background: last night at black friday, car would not start. Would have to wait five minutes to start the car. This happened 3 times total. Measured key pellet. 7.5k ohms. Made a resistor pack. Measures to 7.51k ohms. Found the orange wire coming from the ignition. This is a flat, orange wire that has 2 strands of wires inside of it. Once cut car would not start at all. I cut it coming down from the ignition, underneath the sound panel, and before the wiring harness. Soldered in my resistor pack. Car will not start. Security light flashes until I put in the key and turn it, then the security light is off. I believe it should be ON for 2 seconds. I am getting an FF47 Code (low freon) I measured the resistance with my multimeter and it is still 7.51k ohms. I am trying to find my theft system relay without any luck. I am out of ideas, please help! WARNING: I'm a total car newbie, don't be surprised if I ask a stupid question! Just trying to learn. Cheers! 5% discount code at RockAuto.com - click here for your discount! Link to comment Share on other sites More sharing options...
lothos Posted November 27, 2011 Author Report Share Posted November 27, 2011 from FSM: "BULB NEVER ILLUMINATES AND ENGINE DOES NOT START If the "Security" indicator does not illuminate at all and the engine does not start, this indicates that the PASS KEY module sensed an open, a short, or otherwise invalid (value matched none of the available 15 key codes) input from the ignition key resistor input. During this mode of operation the PASS KEY module will NOT start the disable timer. This mode of operation could also be caused by malfunctioning power or ground circuits. Check that the ignition key is not damaged and refer to the diagnostic procedures in ELECTRICAL DIAGNOSIS (SECTION 8A-133) for correction." My key should be good, I had a new one made at the hardware store. I will try my old key now. 8A-133 section is HUGE WARNING: I'm a total car newbie, don't be surprised if I ask a stupid question! Just trying to learn. Cheers! 5% discount code at RockAuto.com - click here for your discount! Link to comment Share on other sites More sharing options...
lothos Posted November 27, 2011 Author Report Share Posted November 27, 2011 my old key did not work. Did I solder my resistor pack into the wrong section of the orange wire? does it go BEHIND the wire harness? When I turn the key, I CAN hear the fuel pump. I can also hear some kind of relay clicking over near the glove box. I CANNOT hear the starter. I'm beginning to go through the section 8A-133, but it's big. Any help is appreciated WARNING: I'm a total car newbie, don't be surprised if I ask a stupid question! Just trying to learn. Cheers! 5% discount code at RockAuto.com - click here for your discount! Link to comment Share on other sites More sharing options...
lothos Posted November 27, 2011 Author Report Share Posted November 27, 2011 from more research: The orange tubing with the two 22gauge wires inside runs up into the steering column to the key. One wire goes to each side of the key. The wire runs down to a big harness. The 2 wires inside the orange tubing goes to pins 12 and 13 of the harness. It appears that you can simply take your resistor pack and install it on pins 12 and 13, so that nothing else is attached except your resistor pack going from pin 12 directly to pin 13. I am going to try this next, and if it works I will snip off the wire as close to the steering wheel as I can. WARNING: I'm a total car newbie, don't be surprised if I ask a stupid question! Just trying to learn. Cheers! 5% discount code at RockAuto.com - click here for your discount! Link to comment Share on other sites More sharing options...
lothos Posted November 27, 2011 Author Report Share Posted November 27, 2011 Ok, making some progress here Instead of splicing my resistor pack in between the ignition and they harness, I "shorted" out pins 12 and 13 with my resitor pack and the car started I am going to cut the orange wire off as close to the ignition as I can. Now I need to figure out how to unplug that BIG harness, and install my resistor pack inside to the harness pins. I believe the harness has a bolt that holds it in place, and I'll need to figure out how to pull those wires out of the harness to install my own. I think when this is all said and done I will do a writeup with photos, because some of the instructions I've found aren't that great and I believe that "shorting" pins 12 and 13 with your resistor pack is much easier. WARNING: I'm a total car newbie, don't be surprised if I ask a stupid question! Just trying to learn. Cheers! 5% discount code at RockAuto.com - click here for your discount! Link to comment Share on other sites More sharing options...
lothos Posted November 27, 2011 Author Report Share Posted November 27, 2011 Update: car is fixed! the instructions I found said to splice your resistor pack into the flat orange wire running from the ignition to the harness. This did not work for me. I'm not sure if it was because the key was still MOSTLY working, and the car was reading double the resistance (15k ohms) instead of the normal 7.5k ohms.... but either way it was not working for me. I will do a complete writeup soon, but basically here's my modified steps: find the flat orange wire coming from the ignition. The orange wire has two seperate strands of wires inside of it. Cut it off as close to the ignition as you can. Follow the orange wire until you get to the wiring harness. The orange wire splits and the wires go to pins 12 and 13 of the wiring harness. Cut this off about 4 inches from the harness. Connect one end of your resistor pack to one side of the wire, and connect the other side of the resistor pack to the other side of the wire. That's basically it It was really frustrating when I did the same thing here as we successfully did on the old STS and it wasn't working. WARNING: I'm a total car newbie, don't be surprised if I ask a stupid question! Just trying to learn. Cheers! 5% discount code at RockAuto.com - click here for your discount! Link to comment Share on other sites More sharing options...
KHE Posted November 27, 2011 Report Share Posted November 27, 2011 Yes - you need to cut the wires leading to the ignition switch or the module will see half the resistance that it should because the resistor pack and the key are in parallel. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
the gold2 Posted November 28, 2011 Report Share Posted November 28, 2011 Brilliant deductive work ! That's how stuff goes many times. You get left out in open water w/o a life vest and you have to get to figurin' or sink. A help thread would be great. That contribution is excellent for this forum. Sometimes even the FSM has sketchy instructions... or mislabeled items. I think the pass key module is in the trunk on the wall behind the back seats, for what its worth. Link to comment Share on other sites More sharing options...
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