no crank with key 97 blazer

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=110912
Printed Date: May 13, 2025 at 4:57 AM

Topic: no crank with key 97 blazer

Posted By: vlepouce
Subject: no crank with key 97 blazer
Date Posted: January 23, 2009 at 10:48 AM

I have a 791xv in my Blazer about 3 years. The last couple of days it will only crank occasionally with the key. Always cranks and starts with the remote. Even if it will not crank with the key I can take over with the key and everything is fine. Ignition switch replaced 2 years ago. If I unplug the control wires on the relay pack there is no change when it will not crank with the key. Any suggestions?

Replies:

Posted By: james bond 007
Date Posted: January 23, 2009 at 11:06 AM

Sounds like the contacts in your ignition switch are gone, you can check this by checking the starter wire yellow or purple coming from the back of the ign switch, check the wire during crank if there is no 12volts on that wire I would replace the switch again, or you could use a jumper wire from 12v to the starter wire to see if it cranks

Posted By: audifive
Date Posted: January 23, 2009 at 5:01 PM

i agree...ive seen more than a few of those with bad ignition switches.

Posted By: ckeeler
Date Posted: January 23, 2009 at 5:41 PM

before you change the switch again, use Bond's suggestion and test for voltage out of the switch on the start wire. if you have voltage there, then test for voltage on the purple side of the start wire while you use the key. you may have a problem there with the anti grind circuit.

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