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97 chev lumina. when u turn key engine doesn't crank.

97 chev lumina...

97 chev lumina . when u turn key engine doesn't crank. battery, starter all new and good. with ignition on, using remote starter switch car cranks and starts right up. runs for 2 seconds then shuts off. also have 2 chipped keys neither makes a difference. i'm guessing theft deterrent module bad or relay if these are two different components. if i replace module will i have to get new keys also. where are these components and can relay be bypassed to determine its bad

Mechanic's Assistant: Can you turn the steering wheel at all? And what about the key? Is it worn or damaged?

Yes wheel turns. have 2 keys both in good condition

Mechanic's Assistant: Are you fixing your Lumina yourself? What have you tried so far?

It has new battery. put new starter in. using remote starter switch i applied power to solenoid with ign. switch on and it starts and runs for 2 seconds then dies

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Can i test module and or relay. if those are the culprit will my keys still work

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Answered in 4 minutes by:
1/22/2018
Dan
Dan, Technician
Category: Chevy
Satisfied Customers: 26,041
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Hello, my name is ***** ***** I'm here to help get your problem solved.

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This most likely means the ignition lock cylinder has failed. There are two white wires going to the lock cylinder, these read resistance of key. So check resistance of chip in key then compare resistance to reading on white wires with key in off, on, and start position. Resistance on white wires should show same reading as key, if not replace the lock cylinder. Let me know if you have questions, thanks.

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Customer reply replied 6 months ago
how do i check resistance of keys
Customer reply replied 6 months ago
if i replace cylinder will i have to replace keys also. they are expensive. don't want to put that much money in car. that's why i'm fixing myself

You will not need to replace the key if you replace the lock cylinder and you can check resistance using a multimeter which you can buy from parts store for around $20. Let me know if you have questions, thanks.

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Customer reply replied 6 months ago
I contacted either side of chip on key and got 6.96 on one and 7.38 ohms on the other. is that correct way to check. does the figures sound right

Here is a diagram that shows what resistance readings should be, there are 15 different chips available.

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https://www.dropbox.com/s/8sayexitgu1tixf/charts.PNG?dl=0

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Customer reply replied 6 months ago
Thank u Dan. I'm quite sure u hit the nail on the head

No problem, I'm happy to help. Let me know if you end up running into questions or need anything, thanks again and please don't forget to rate answer.

Dan
Dan, Technician
Category: Chevy
Satisfied Customers: 26,041
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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