Originally Posted by Space387

New CCM's arent available any more and they require a GM dealer or a friend with a GM tech II programmer when new for the odometer. A lot of other systems would be malfunctioning if it was the CCM. Also the ICM and coil are not part of the circuit for activating the starter. AI generated information is marginal at best when dealing with something as antiquated as our cars. I would suggest getting your hands on a copy of the 1994 factory service manual. its 2 books, the FSM and the 8A electrical supplement. It gives step by step instructions how to diagnose just about every issue along with location diagrams of where components are.

What you should do is go back to the starter enable relay and start probing. Check pin 1 and pin 5 for voltage with the key to start. If you have 12v on both of them with key on use a test light between pin 2 and 5 when you try to start the car. That will narrow down what circuit is causing the issue.

If pin1 does not have voltage it's an issue with your ignition switch or the pair of 60a fuses. Pin 5 depends on the circuit for pin 1 so check 1 first. If 1 has power but 5 does not it is either the Crank fuse (10) on the instrument panel fuse block on the passenger side of the dash, or the transmission position switch is not detecting P or N position.

If you have power to 1 and 5 when the key is set to start use the probe light between 5 and 2. If the CCM is locking you out it will not provide a ground for pin 5.

If your CCM is the issue I would not go straight to replacement. It is probably an issue with a securety feature needing to be disabled. I am not familiar with the security features of the later C4's so I dont want to lead you wrong.

Originally Posted by WVZR-1

There's a 5A CRANK #10 fuse in the fuse block right side of IP. Have you checked that?

1st check needs to be, is 'SECURITY' light on 'SOLID' when you're attempting to crank with the key? If you have a 'SOLID' security light, it's for sure a possible VATS issue. Have you tried a spare key?

Originally Posted by Dougk56

I tried another key and it made no difference. Also, when I try to start my car, there is no SECURITY light of any kind appearing anywhere, and yes my #10 fuse is good. I've never had a key fob or any kind of enacted security that I'm aware of.

Originally Posted by WVZR-1

Turn key to run (no cranking) and if the SECURITY light goes 'solid' it's VATS.

Since you were able to jump starter connection and achieve crank there's of course the checks of the Neutral Safety Switch and Start Enable Relay but with doors open for extended period of time etc. maybe the CCM has gone to sleep and isn't waking up, WAG. You might confirm if CCM1, CCM2 and CCM3 fuses are good. You mentioned having the FSM so that's a +.

Originally Posted by Dougk56

I have no SECURITY light of any kind. Don't ever remember seeing one. I will check all fuses again by tomorrow. What is WAG?

Originally Posted by WVZR-1

WAG? Wild A$$'d Guess that was regarding the only simple checks left that are easy. The SECURITY light is I believe in all '90+ C4 immediately to the left of the tach pointer? Right next to 'Change Oil Indicator'? Door Ajar would be in the vicinity. SECURITY light would flash related to several functions in a '94 I believe. Hard to believe you never noticed.

I might be tempted to use the DIC and check for CCM DTC's. That would be a very good learning experience for sure for a C4 owner for many reasons. Learn complete diagnostics using the DIC and the cluster. 8D Section of Book 1 FSM covers it all.

Originally Posted by Dougk56

Dear Space387 and WVZR-1..... So sorry to have taken your time and energy helping me with my problem. I had a wonderful moment this morning. I went through all interior fuses, and when I came to fuse number 39 marked CCM 2, I realized this is the fuse I'd removed that made my courtesy interior lights go dead so I'd not run my battery low while doors had to be open to replace weatherstripping. At that time, I had no idea of a central control module. When I took note of what that fuse was marked, it struck me that this fuse could possibly do much more than just turning off the interior lighting. Sure as heck, when I put that fuse back in, my mood elevated immensely as my car now starts and works wonderfully. Please know your help wasn't wasted. Getting me familiar with this CCM was so important. I wasted a lot of time, both yours and mine, and some money too, but your help was paramount. It isn't easy being me, and I thank you immensely. Doug K.

Originally Posted by Space387

Im glad you found the issue. I'm always happy to get people familiar with doing diagnostic work to solve issues rather than dumping money on unneeded parts

Originally Posted by WVZR-1

Always good to see success. Thanks for posting back with what was your problem. Many might have just disappeared. That 8D Section, CCM is a very interesting read! I avoided the thread until I saw the 8A-30-0 posted for the wrong year car.