Power key switch question - ZR-1 Net Registry Forums

Ozruss90 · 03-04-2019

Can someone please confirm that the power switch, switches negative?
Pulled my switch out and apart, thinking there maybe a problem, as my full power does not light up in the dash panel and my secondaries do NOT work.
Switch works fine so l put a test lamp on the connector plug on the back of the switch with the ignition on. No power at either side of the plug ( so lm thinking it switches negative?)
If this is all correct and working, why no light on the dash panel?
Help please

Cheers from down under 🇦🇺
Russell

QB93Z · 03-04-2019

What year is your ZR-1? The Power Switch for 1990 is different from 1991-1995.

Jim

Ozruss90 · 03-04-2019

Quote:

Originally Posted by QB93Z

What year is your ZR-1? The Power Switch for 1990 is different from 1991-1995.

Jim

The car is 1990, #1948. 11k Miles

tccrab · 03-04-2019

Perhaps the bulb in the DIS is burnt out?

Is there a noticeable difference between the lower power setting and the high power setting?
It will be obvious if your secondaries are working or not.

'Crabs

Ozruss90 · 03-04-2019

Quote:

Originally Posted by tccrab

Perhaps the bulb in the DIS is burnt out?

Is there a noticeable difference between the lower power setting and the high power setting?
It will be obvious if your secondaries are working or not.

'Crabs

Problem is l don’t have another ZR-1 to compare it to. Few and far between over here in OZ. But after being on this forum for the last couple of years and reading all the different posts about how mighty the LT5 is, mine must have a problem somewhere. Average of the mark and won’t pull past 5k revs. Nice to drive but not living up to the ZR-1 reputation .

Reichert · 03-04-2019

recommended reading: http://www.zr1specialist.com/HAT%20W...%20Working.pdf

lfalzarano · 03-04-2019

If the vacuum line accidentally came apart, it would give you the poor power feeling.

The valet parking switch (LT5), located on the accessory trim plate, sends a signal to the ECM. With the key in the “NORMAL" position one set of injectors operate while the “FULL" position activates a second set of injectors, a second fuel pump and a second throttle plate which increases engine power. Key may be removed only in the “NORMAL" position.

I’d check your fuses and a possible broken wire or loose connection. There should be power to the key, which will light up the Full on the display and the secondary injectors. When you get that light working, the ZR-1 will light you up on FULL throttle!

Sent from my iPhone using ZR-1 Net Registry

geezer · 03-04-2019

Ozruss90 : This may help.

Ozruss90 · 03-05-2019

Thanks Lou and Geezer.
If it is just a fuse, then I’ll be rapt. Been thinking my problem was under the plenum all this time. Not sure where to locate the suspect fuse . All the fuses in the main fuse block on passenger end of the dash seem ok. Is the fuse for the valet/power switch somewhere else? Not sure where to look.

Cheers
Russell

geezer · 03-05-2019

Russell: Valet switch shares the CCM fuse (10 amp) Main Fuse Block-- along with O2 sensors, rear defog, AC clutch relay,heater & A/C programmer

03-04-2019	#2
QB93Z Join Date: May 2007 Location: Westminster, Maryland Posts: 3,689	Re: Power key switch question What year is your ZR-1? The Power Switch for 1990 is different from 1991-1995. Jim __________________ If it isn't fun, you aren't doing it right! 1990 Black ZR-1 - sold 1993 Quasar Blue ZR-1 1994 Competition Yellow ZR-1 1995 Dark Purple ZR-1 Maryland State Coordinator WAZOO Member

03-04-2019	#4
tccrab Join Date: Oct 2004 Location: Folsom CA Posts: 1,656	Re: Power key switch question Perhaps the bulb in the DIS is burnt out? Is there a noticeable difference between the lower power setting and the high power setting? It will be obvious if your secondaries are working or not. 'Crabs __________________ TomC '90ZR1 #792 Honorary Pirate [B]If it ain't FUN, you're doing something terribly WRONG. [/B]

03-04-2019	#6
Reichert Join Date: Feb 2018 Location: Austin, TX Posts: 104	Re: Power key switch question recommended reading: http://www.zr1specialist.com/HAT%20W...%20Working.pdf __________________ -Stephen 1990 #2288

03-04-2019	#7
lfalzarano Join Date: Feb 2011 Location: Clayton, North Carolina Posts: 1,133	Power key switch question If the vacuum line accidentally came apart, it would give you the poor power feeling. The valet parking switch (LT5), located on the accessory trim plate, sends a signal to the ECM. With the key in the “NORMAL" position one set of injectors operate while the “FULL" position activates a second set of injectors, a second fuel pump and a second throttle plate which increases engine power. Key may be removed only in the “NORMAL" position. I’d check your fuses and a possible broken wire or loose connection. There should be power to the key, which will light up the Full on the display and the secondary injectors. When you get that light working, the ZR-1 will light you up on FULL throttle! Sent from my iPhone using ZR-1 Net Registry __________________ Lou[COLOR="Red"][B][SIZE="4"][/SIZE][/B][/COLOR]

03-05-2019	#9
Ozruss90 Join Date: Oct 2016 Location: Shepparton. Vic. Australia Posts: 159	Re: Power key switch question Thanks Lou and Geezer. If it is just a fuse, then I’ll be rapt. Been thinking my problem was under the plenum all this time. Not sure where to locate the suspect fuse . All the fuses in the main fuse block on passenger end of the dash seem ok. Is the fuse for the valet/power switch somewhere else? Not sure where to look. Cheers Russell

03-04-2019	#1
Ozruss90 Join Date: Oct 2016 Location: Shepparton. Vic. Australia Posts: 159	Power key switch question Can someone please confirm that the power switch, switches negative? Pulled my switch out and apart, thinking there maybe a problem, as my full power does not light up in the dash panel and my secondaries do NOT work. Switch works fine so l put a test lamp on the connector plug on the back of the switch with the ignition on. No power at either side of the plug ( so lm thinking it switches negative?) If this is all correct and working, why no light on the dash panel? Help please Cheers from down under 🇦🇺 Russell

03-05-2019	#10
geezer Join Date: Aug 2010 Location: ottawa canada Posts: 156	Re: Power key switch question Russell: Valet switch shares the CCM fuse (10 amp) Main Fuse Block-- along with O2 sensors, rear defog, AC clutch relay,heater & A/C programmer