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THEFT light blinking no crank on a 2000 Ranger XLT

LarryMgs

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July 15, 2015
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Year, Model & Trim Level
2000 Ford Ranger XLT
Hi everyone,

I've been driving and fixing up my elderly in-law's 2000 Ranger XLT. There's been a major problem that has a rose that has me digging.

It all began when the passenger door would be opened and closed. Truck ran fine, then I would go and start it the next time, and Boom. Nothing, no crank just barely dash lights and a faint open door tone. I would jump it, and it'd run fine, till the passenger door was opened again, then after shut off, it wouldn't start.

Now today, it seems to do it when the driver's door is opened. I changed out the battery, it was nasty and old and I happened to have a fresh spare (the battery and alternator check out fine on the multi-meter). Well, this problem is still happening, the new battery seems to of helped me find another clue. Now, with cold cranking amps, I see the THEFT light flashing, so I'm reading up on stuff and trying to figure it all out. Is it a sensor in the door doing this? Is it the PCM? It is really bizarre all this going on. I've worked on vehicles all my life and have a auto mechanic diplomas from high school and I've never came across it, nor have buddies or family that have worked in the field or messed around for years.

I would appreciate any tips in the right direction, and thanks for the time any of you put into this.

Larry
 






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