Can ANYBODY help a brother out,ABS is dead and I give up. - ZR-1 Net Registry Forums

Z51JEFF · 06-18-2010

Thanks for your time Lee,Im going to take a look at the accel module.

LGAFF · 06-18-2010

Found this....

Had a similar problem six months ago with the ABS light coming on while stopping. Would stay on till I shut the motor off. Restart and all was OK till next hard brake application.

All fuilds were in good shape level wise but kind of tired in terms of age. One Sunday I hooked my MytyVac brake bleeder to the ABS bleed port in the ABS vault behind the driver seat. Apparently had some smal quantity of air that had precipitated over 16 years and it was moving around inside the ABS valve system. Hard braking would initiate ABS activity and thus trigger the event. Since air is compressible the system barfed a alert. I bled out a couple of 1/2 cc. bubbles and about 1/2 a shot glass of brake fuild till no more bubbles appeared (just to be sure since it's so cheap) and haven't had an issue since.

bdw18_123 · 06-18-2010

I live kinda far from you (a little over 3 hours, but same state at least, lol!), but I'd be willing to drive up there and give a ZR-1 brother a hand. I'd love to hear a ZR-1 in person (maybe a spirited ride too?

). The $100 would cover my gas costs (my truck is a gas hog, lol).

I don't have any experience with the ABS system specifically, but I'm pretty good with electronics & troubleshooting. Maybe I could bring some of the ABS components of my '90 ZR-1 for testing purposes (though if the systems are completely different, that might not work). If you still have that Tech 1 tester, I could also try my hand at that.

Let me know.

LGAFF · 06-18-2010

You know what I have the ABS manual upstairs somewhere, let me look.

LGAFF · 06-19-2010

-Check Stop/Haz Fuese
-Check Brake fuse
-Check Inj 1 fuse
-Check Fusible Link J
-Check Pump motor relay and solenoid Valve Relay are seated
-Check CMC is properly mated
-Check Brake Fluid Level

*Release park brake, Turn ing to Run ....Antilock will light for several seconds

*Antilock should light when cranking

Most of the diagnostics require the Testing system

Aurora40 · 06-19-2010

Does the controller have power going to it? It's odd that it won't at least enter the diagnostic mode.

You don't have the ABS light on, right, it just won't engage? And the bulb is good, it lights up at key-on?

LGAFF · 06-19-2010

No lights today..hmmmm

06-18-2010	#1
Z51JEFF Join Date: Dec 2007 Location: Fremont,Ca Posts: 3,054	Can ANYBODY help a brother out,ABS is dead and I give up. Thanks for your time Lee,Im going to take a look at the accel module. Last edited by Z51JEFF; 06-21-2010 at 11:09 PM.

06-18-2010	#2
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: Can ANYBODY help a brother out,ABS is dead and I give up. Found this.... Had a similar problem six months ago with the ABS light coming on while stopping. Would stay on till I shut the motor off. Restart and all was OK till next hard brake application. All fuilds were in good shape level wise but kind of tired in terms of age. One Sunday I hooked my MytyVac brake bleeder to the ABS bleed port in the ABS vault behind the driver seat. Apparently had some smal quantity of air that had precipitated over 16 years and it was moving around inside the ABS valve system. Hard braking would initiate ABS activity and thus trigger the event. Since air is compressible the system barfed a alert. I bled out a couple of 1/2 cc. bubbles and about 1/2 a shot glass of brake fuild till no more bubbles appeared (just to be sure since it's so cheap) and haven't had an issue since. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

06-18-2010	#3
bdw18_123 Join Date: Apr 2009 Location: Prather, CA Posts: 809	Re: Can ANYBODY help a brother out,ABS is dead and I give up. I live kinda far from you (a little over 3 hours, but same state at least, lol!), but I'd be willing to drive up there and give a ZR-1 brother a hand. I'd love to hear a ZR-1 in person (maybe a spirited ride too? ). The $100 would cover my gas costs (my truck is a gas hog, lol). I don't have any experience with the ABS system specifically, but I'm pretty good with electronics & troubleshooting. Maybe I could bring some of the ABS components of my '90 ZR-1 for testing purposes (though if the systems are completely different, that might not work). If you still have that Tech 1 tester, I could also try my hand at that. Let me know. __________________ [IMG]http://i13.photobucket.com/albums/a292/bdw18_123/_zr1netforumsigphoto.jpg[/IMG][B] 1990 Corvette ZR-1 [/B][I] White/Flame Red, #2299, mostly stock, 144K miles.[/I] -Cams timed to the '93-'95 405HP LT5 stock timing. -IAT sensor relocated to below front bumper. -Haibeck hoops installed in airduct. -OBX cat-back exhaust. [COLOR=DarkRed][B](SOLD - December 2012 [/B][/COLOR][COLOR=DarkRed][B]:hello:)[/B][/COLOR] 1993 Corvette Coupe Black/Black, 6-speed (SOLD - October 2009 :hello:)

06-18-2010	#4
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: Can ANYBODY help a brother out,ABS is dead and I give up. You know what I have the ABS manual upstairs somewhere, let me look. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

06-19-2010	#5
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: Can ANYBODY help a brother out,ABS is dead and I give up. -Check Stop/Haz Fuese -Check Brake fuse -Check Inj 1 fuse -Check Fusible Link J -Check Pump motor relay and solenoid Valve Relay are seated -Check CMC is properly mated -Check Brake Fluid Level Release park brake, Turn ing to Run ....Antilock will light for several seconds Antilock should light when cranking Most of the diagnostics require the Testing system __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

06-19-2010	#6
Aurora40 Join Date: May 2005 Location: Leesburg, VA Posts: 2,713	Re: Can ANYBODY help a brother out,ABS is dead and I give up. Does the controller have power going to it? It's odd that it won't at least enter the diagnostic mode. You don't have the ABS light on, right, it just won't engage? And the bulb is good, it lights up at key-on? __________________ Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img]