Cruise control inop - Page 2 - ZR-1 Net Registry Forums

Jetjock · 06-11-2014

I checked that this morning and it is clicking on and off. I started the diagnostics and discovered that there was no signal from the speed sensor to the cruise control module. I know the speed sensor works because the volume increases when I punch it and my speedometer works. I'm going to rig a jumper and see if that works from another source.

Jetjock · 06-11-2014

I'm not sure if I am reading this correctly but the service manual didn't exactly state the condition with which to test the speed sensor continuity. Making an assumption that key on, engine off and cruise on. Anybody else think that?

Schrade · 06-11-2014

CC diags starts here, with detailed snappics, post 33.

I have a suspicion that Mr GK cared not to attempt contortion exercises necessary to access CC module, which is ABOVE the CDM module under P side dash. That's where CC diags begins. All else is in vain.

2 circuits in the harness must be jumped for Test 1

Jetjock · 06-11-2014

[QUOTE=Schrade;205481]CC diags starts here, with detailed snappics, post 33.

I have a suspicion that Mr GK cared not to attempt contortion exercises necessary to access CC module, which is ABOVE the CDM module under P side dash. That's where CC diags begins. All else is in vain.

Not true about that. He crawled under the drivers side and unfastened and then reattached the carpet part of the bolster since I have a torn shoulder muscle and can't reach the firewall with my right arm. You should have seen the stump of his finger. It started bleeding along with the other scratches on his right hand. He fixed a bunch of other stuff before we got to the cruise part. We were running out of time since I had to get back home. We did determine that it was an electronic issue since vacuum was working.

By the way, this is a 93 ZR-1. No CDM. It's in the back behind the pax seat.

Jetjock · 06-13-2014

Quote:

Originally Posted by GOLDCYLON

Is the brake switch centered on the brake pedal arm? If its not the cruise wont set.

Dude, I followed the electrical diagnostics and it lead me to the stoplamp/cruise brake switch. I looked at the brake switch and it was centered although the clutch switch was hitting in the middle. I suspect that the brake switch is the culprit here. I plan to check it this morning. Had company come over last night and they stayed overnight. Hopefully, if it is bad, I can get another or repair this one.

Schrade · 06-13-2014

I have mine left over from auto conversion; 14043256 GM pt #. Looks like it snaps open readily for testing.

If yours fails continuity test, you can have mine for postage (never subscribed to 'new part Plug n PRay' diagnostics

).

Jetjock · 06-29-2014

Got the cruise control to work again with help of Gordon Killebrew. Took the car down there with manuals, showed him I found out and he went right to the problem. Bad clutch switch. He re-engineered it to work and it was fantastic! While we were at it, he got the LWTPS to work again, all I have to do is put the new module back in the car. Found out a lot about the 93 car and how different they are from the earlier ones.

Fully Vetted · 07-06-2014

I thought for sure it was going to be the Nut behind the wheel

I don't think I've ever seen Gordon fix only one issue.

Jetjock · 07-08-2014

Quote:

Originally Posted by Fully Vetted

I thought for sure it was going to be the Nut behind the wheel

I don't think I've ever seen Gordon fix only one issue.

Actually, he did fix only one issue. The LTPWS he had already worked on but it was a different module. He simply switched modules and it worked. We talked about your car for a bit but decided that to fix the car, we would have to fix the driver first. Seems all of the problems originate in the drivers seat!

Are you going to Carlisle or is that too much of jump for you? It's about 1300 miles from Dallas. Just a hint but you can stay at my house and leave from there. It's only 700 miles give or take from where I live.

Scrrem · 07-08-2014

Quote:

Originally Posted by Jetjock

Got the cruise control to work again with help of Gordon Killebrew. Took the car down there with manuals, showed him I found out and he went right to the problem. Bad clutch switch. He re-engineered it to work and it was fantastic!

My cruise is not working either, may check this. So how did he re-engineer a bad clutch switch? Was the switch bad or just need to be repostioned to make better contact?
Rich

06-11-2014	#11
Jetjock Join Date: Mar 2008 Location: Auburn, KY Posts: 551	Re: Cruise control inop I checked that this morning and it is clicking on and off. I started the diagnostics and discovered that there was no signal from the speed sensor to the cruise control module. I know the speed sensor works because the volume increases when I punch it and my speedometer works. I'm going to rig a jumper and see if that works from another source. __________________ Roy L. Carman If I feel the need for speed, I just think about flying the B-777. 1989 Dk Blue Coupe lost in divorce 1991 Black Coupe SOLD 1992 Black ZR-1 #423 SOLD! 1993 Ruby Red 40th Anniversary ZR-1 #334 1995 Black ZR-1 taken by ex-wife 2002 Pewter Coupe no idea where it is 2003 50th Anniversary Corvette #No idea what number SOLD! ZR-1 Net Registry #516 Grand Sport Lifetime Member NCM Lifetime #1468 ZR-1 Net Registry Board Secretary

06-11-2014	#12
Jetjock Join Date: Mar 2008 Location: Auburn, KY Posts: 551	Re: Cruise control inop I'm not sure if I am reading this correctly but the service manual didn't exactly state the condition with which to test the speed sensor continuity. Making an assumption that key on, engine off and cruise on. Anybody else think that? __________________ Roy L. Carman If I feel the need for speed, I just think about flying the B-777. 1989 Dk Blue Coupe lost in divorce 1991 Black Coupe SOLD 1992 Black ZR-1 #423 SOLD! 1993 Ruby Red 40th Anniversary ZR-1 #334 1995 Black ZR-1 taken by ex-wife 2002 Pewter Coupe no idea where it is 2003 50th Anniversary Corvette #No idea what number SOLD! ZR-1 Net Registry #516 Grand Sport Lifetime Member NCM Lifetime #1468 ZR-1 Net Registry Board Secretary

06-11-2014	#13
Schrade Join Date: Dec 2012 Location: NC Posts: 1,786	Re: Cruise control inop CC diags starts here, with detailed snappics, post 33. I have a suspicion that Mr GK cared not to attempt contortion exercises necessary to access CC module, which is ABOVE the CDM module under P side dash. That's where CC diags begins. All else is in vain. 2 circuits in the harness must be jumped for Test 1 __________________ I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG] Last edited by Schrade; 06-11-2014 at 09:49 PM.

06-11-2014	#14
Jetjock Join Date: Mar 2008 Location: Auburn, KY Posts: 551	Re: Cruise control inop [QUOTE=Schrade;205481]CC diags starts here, with detailed snappics, post 33. I have a suspicion that Mr GK cared not to attempt contortion exercises necessary to access CC module, which is ABOVE the CDM module under P side dash. That's where CC diags begins. All else is in vain. Not true about that. He crawled under the drivers side and unfastened and then reattached the carpet part of the bolster since I have a torn shoulder muscle and can't reach the firewall with my right arm. You should have seen the stump of his finger. It started bleeding along with the other scratches on his right hand. He fixed a bunch of other stuff before we got to the cruise part. We were running out of time since I had to get back home. We did determine that it was an electronic issue since vacuum was working. By the way, this is a 93 ZR-1. No CDM. It's in the back behind the pax seat. __________________ Roy L. Carman If I feel the need for speed, I just think about flying the B-777. 1989 Dk Blue Coupe lost in divorce 1991 Black Coupe SOLD 1992 Black ZR-1 #423 SOLD! 1993 Ruby Red 40th Anniversary ZR-1 #334 1995 Black ZR-1 taken by ex-wife 2002 Pewter Coupe no idea where it is 2003 50th Anniversary Corvette #No idea what number SOLD! ZR-1 Net Registry #516 Grand Sport Lifetime Member NCM Lifetime #1468 ZR-1 Net Registry Board Secretary

06-13-2014	#16
Schrade Join Date: Dec 2012 Location: NC Posts: 1,786	Re: Cruise control inop I have mine left over from auto conversion; 14043256 GM pt #. Looks like it snaps open readily for testing. If yours fails continuity test, you can have mine for postage (never subscribed to 'new part Plug n PRay' diagnostics ). __________________ I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG]

06-29-2014	#17
Jetjock Join Date: Mar 2008 Location: Auburn, KY Posts: 551	Re: Cruise control inop Got the cruise control to work again with help of Gordon Killebrew. Took the car down there with manuals, showed him I found out and he went right to the problem. Bad clutch switch. He re-engineered it to work and it was fantastic! While we were at it, he got the LWTPS to work again, all I have to do is put the new module back in the car. Found out a lot about the 93 car and how different they are from the earlier ones. __________________ Roy L. Carman If I feel the need for speed, I just think about flying the B-777. 1989 Dk Blue Coupe lost in divorce 1991 Black Coupe SOLD 1992 Black ZR-1 #423 SOLD! 1993 Ruby Red 40th Anniversary ZR-1 #334 1995 Black ZR-1 taken by ex-wife 2002 Pewter Coupe no idea where it is 2003 50th Anniversary Corvette #No idea what number SOLD! ZR-1 Net Registry #516 Grand Sport Lifetime Member NCM Lifetime #1468 ZR-1 Net Registry Board Secretary

07-06-2014	#18
Fully Vetted Join Date: Sep 2012 Location: Rockwall, Tx Posts: 1,510	Re: Cruise control inop I thought for sure it was going to be the Nut behind the wheel I don't think I've ever seen Gordon fix only one issue. __________________ _________________ 1994 AB/Grey #141 430 RWHP/392 RWTQ FBI Lyposuction / Secondaries relieved of duty / SW Long Tube Headers / Corsa Exhaust / FIC SS Injectors / MSD Coils / Lightweight Pulleys / Corey tuned B & M Shifter / Aluminum Flywheel / Samco Hoses / Shelby Series One's / C4 No Flex Frame Stiffener BBC - Bling By Carter: Custom ZR-1 Center Caps / Custom Plenum Plate / Air Box Knobs / TB Cover / Oil Filter Cover