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My 99 Durango, 157,000ish, is a no crank, no start. Since issue started: New battery. Replaced ignition switch with one from the pull and pay. Bypassed the relay and started right up, but still no crank no start with the key. Issue: Leaving for work early 2020, snowy day and it wouldn't start. Tried roadside for a jump and nothing. Tried new battery first. Still no crank no start, but the horn would honk when I would crank. I removed the horn fuse so I could continue to troubleshoot without bugging neighbors. Only thing I really did is replace the ignition switch with a used one. Other than new battery and bypass the relay. I'm just a level 0 do it yourselfer. I probably could have made this message shorter. I need help! Thank you in advance!
Well done with the relay bypass. That answers a lot of questions about the starter and electrical system. Have you tried cranking the engine with the shifter in Neutral instead of Park?
Thank you!Yes I have tried to crank in neutral. I will again to double check. Keyless entry works. Almost replaced the starter before bypassing the relay.
If you have access to service info it will tell you. Ie Mitchell or alldata see below. I would recommend you do the 30 min relearn as my experience is the short one never works.
Ignition lock cylinder as some vehicles have a rfid chip or incoded key that sends a signal to bcm to say ok to crank engine and start vehicle. Do you have a anti theft light flashing?
Not in the dashboard lights, but there is what looks like an auxiliary port, headphone port, with a red light that sits just under and to the right of steering wheel. I'm not sure if that is stock or aftermarket. That light flashes all the time. I read somewhere that the blinking led is also a button.
Last edit: 5 years 9 months ago by Globeville. Reason: More thoughts!
Just follow the wires going from it to under the dash. 2 wires from immobilizer will be connected to the start signal wire. Just get pics of what the wires connect to and we can walk you through removing it.
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That answers a lot of questions about the starter and electrical system. Have you tried cranking the engine with the shifter in Neutral instead of Park? 
