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Fast flashing usually indicates that one of the exterior bulbs isn't functioning. You've checked front and rear signal lights, right? If the bulb is good, it could be corrosion in the socket, bad ground, broken wire, etc.
check all connections for tightness, sounds like one is loose somewhere between the battery and the starter or a ground is not tight..turn lights on and see if they go dead when key start is turned,,check the engine to frame ground also(usually a flat braided wire)..if lights go dead when key is turned need to charge the battery for around 4 hrs with a 6 amp charger and try again..may also be a neutral safety switch,,if not out of gear it wont start,,
You may have a bad key chip, try a diffrent key in the ignition, also make sure you do not have magnet strip mini swipe cards on key chain near the ignition. this sounds like the immoboilizer system is active. this system will not allow the coils to spark. The key would be the first thing to check. do this by using another key.if car still will not start then the key reader may be bad, this is located around the ignition . the last problem could be the module or a broken wire.The best way to check this would be with a scan tool. there will be codes stored in the anti or body module. the codes will tell you where the failure is and with some testing the problem can be found. the scan tool can help by reading the values and readings. it can tell you if the key chip is read and if the module accepts it. i think if the spare key does not start the car then it will be cheaper to have a shop diagnose the problem. this will help you from just putting parts in. also this anti theft system needs programing when certain parts are replaced. hope this is helpful, good day
The Avalanche are famous for the dead battery of not driving for 30 days, Your ECM and various module has a parastatic draw that is normal for you vehicle.You also have the ignition problem. Even though you turn off the ignition remove the key the ignition draw power and this has been a porblem with your year make and model You will need to replace the ignition switch Here is the TSB Bulletin No.04-06-03-002.
a blown fuse will not emit a smell unless its blown violently, This means dead short, If you have a dead short that would explain the dead battery and the lack of co operation of the jumping it. Has the car got a system in it? this is going to have to be a large short to create what your describing
did you reuse the original key,and ignition cylinder? the original key has a chip in it. if your using a diff. key,it needs to be programed so the security system recognizes it.if everything works but it wont crank thats probably the problem. the security light may also flash very fast or poss. stay on constant too.
dealership can do it pretty quickly, but you going to need at least two keys to program. or switch out the ignition lock cylinder with the original one
A FORD MACHANIC HAS TOLD ME THAT IN FACT THE KEY HAS TO BE RECODED. MY SITUATION IS EXACTLY THE SAME. HE SAID TO RECODE THE KEY I HAD TO TURN THE IGNITION TO THE RUN POSITION, THE SECURITY LIGHT ON THE DASH WILL FLASH RAPIDLY AND CONTINUE TO FLASH FOR 15 MINUTES . WITHIN FIVE MINUTES AFTER THE LIGHT STOPS FLASHING I MUST TURN OFF THE IGNITION FOR ONE SECOND AND TURN IMMEDIATLY BACK TO THE RUN POSITION FOR 15 MORE MINUTES. THE LIGHT WILL GO OFF AGAIN . WITHIN 5 MIN. I MUST TURN OFF THE IGNITION FOR ONE SECOND AND TURN BACK TU RUNNING POSITION. 15 MINUTES LATER REPEAT STEPS AGAIN AND THE KEY WILL BE REPROGRAMMED, AND STSRT THE CAR. GOOD LUCK MY CONTACT IS A FORD MASTER MECHANIC.
it sounds like you have a poor battery and a draw on your truck put a low amp clamp around the positive battery cable with the truck off and key removed from the truck for 10mins. then if you show more than 350mamps you have an excessive draw to find what is drawing the battery down start removing fuses starting with larger fuses until the amp clamp reads below 350mamps. then you know what circuit is causing the problem. check that the under hood light is turning off. common problem. good luck.