1993 starter won't engage
Thread Starter
Racer
Joined: Mar 2002
Posts: 312
Likes: 6
From: Troy Al
1993 starter won't engage
I can not engage the starter with the ignition switch. I tried to put the right value resistor in to replace the key sensor. I pulled the starter enable relay. 12 volts to the purple wire engages the starter, but I can't get a completed circuit turning the starter switch over to start. I am looking to get a Closure from the 2 yellow wires when the starter is engaged. Right? Those switches should last a long time. It there anything eelse that will cause this? I thought about rigging up a push button switch, but it's a corvette. Not a Massey Furgason.
Safety Car
Joined: Apr 2011
Posts: 3,660
Likes: 22
all you have to do is ground the enable relay.
or
jump the 2 yellow wires. What you are doing will not work if the relay is BAD...which I would assume it IS if it does not work.
Go back and look at the FSM drawings and look at the ground that's common between the enable relay AND the module.
ground is how ALL functions are managed by the ECM in a Corvette.
could buy a new relay too..
BTW
what makes you think its a VATS problem?
or
jump the 2 yellow wires. What you are doing will not work if the relay is BAD...which I would assume it IS if it does not work.
Go back and look at the FSM drawings and look at the ground that's common between the enable relay AND the module.
ground is how ALL functions are managed by the ECM in a Corvette.
could buy a new relay too..
BTW
what makes you think its a VATS problem?
Last edited by leesvet; Jul 9, 2013 at 09:19 AM.
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 42
From: Baltimore, MD USA
The CCM reads the key pellet resistance. If the resistance matches what the CCM
was programmed for it will ground the starter enable relay primary coil winding
which will close the relay. 12 volts will pass thru the relay to the Purple wire.
**************************************** *********************
When you turn the ignition to On is the Security light on the Dash Cluster On
Solid?
**************************************** *********************
If it is, the CCM will not ground the primary coil of the starter enable relay.
In that case you need to verify what key resistance value the CCM is reading.
Run the CCM diagnositic test as listed in the post below.and verify the xxx value. Compare it to the values listed for the 15 different key codes in the second post.
http://forums.corvetteforum.com/1584299061-post4.html
http://forums.corvetteforum.com/1584301993-post26.html
was programmed for it will ground the starter enable relay primary coil winding
which will close the relay. 12 volts will pass thru the relay to the Purple wire.
**************************************** *********************
When you turn the ignition to On is the Security light on the Dash Cluster On
Solid?
**************************************** *********************
If it is, the CCM will not ground the primary coil of the starter enable relay.
In that case you need to verify what key resistance value the CCM is reading.
Run the CCM diagnositic test as listed in the post below.and verify the xxx value. Compare it to the values listed for the 15 different key codes in the second post.
http://forums.corvetteforum.com/1584299061-post4.html
http://forums.corvetteforum.com/1584301993-post26.html
Last edited by Hooked on Vettes; Jul 9, 2013 at 09:48 AM.
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
When you turn the key, you should see 12V on 86 of the relay, and 0V or close to it on the 85 side, or you can also see ground if you remove the relay. If you don't, then you have a bad connection somewhere. Release the key. On 30, depending on if 30 is hot at all times, you should see 12V and you should see ground on 87a, when you turn the key, test 87a and see if you get 12V, if you don't then you have a bad relay. If all those check out okay, test to see if you are getting 12V to the B terminal on the starter with the key off, and also test to see if you have 12V at the S terminals with the key on, if you do, then your problem is with the starter. If you don't, then you have a broken wire or bad connection.
Thread Starter
Racer
Joined: Mar 2002
Posts: 312
Likes: 6
From: Troy Al
all you have to do is ground the enable relay.
or
jump the 2 yellow wires. What you are doing will not work if the relay is BAD...which I would assume it IS if it does not work.
Go back and look at the FSM drawings and look at the ground that's common between the enable relay AND the module.
ground is how ALL functions are managed by the ECM in a Corvette.
could buy a new relay too..
BTW
what makes you think its a VATS problem?
or
jump the 2 yellow wires. What you are doing will not work if the relay is BAD...which I would assume it IS if it does not work.
Go back and look at the FSM drawings and look at the ground that's common between the enable relay AND the module.
ground is how ALL functions are managed by the ECM in a Corvette.
could buy a new relay too..
BTW
what makes you think its a VATS problem?
