Interior Light On - ZR-1 Net Registry Forums

KFoster · 03-05-2019

I have a recurring issue. I replaced the passenger door light switch a year or so ago and it seemed to fix the problem. Issue is back though. Interior lights will come on going down the road. Around a turn. Or just sitting they will come on sporadically when I haven’t Drive the car or opened the door that day. Have to keep it on a charger. They just come on for no reason. Really bad if they come on at night when driving. I do notice they flicker on and off more if I go around a turn or hit a bump. Hatch and all is closed tight. Any ideas?

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GOLDCYLON · 03-05-2019

Quote:

Originally Posted by KFoster

I have a recurring issue. I replaced the passenger door light switch a year or so ago and it seemed to fix the problem. Issue is back though. Interior lights will come on going down the road. Around a turn. Or just sitting they will come on sporadically when I haven’t Drive the car or opened the door that day. Have to keep it on a charger. They just come on for no reason. Really bad if they come on at night when driving. I do notice they flicker on and off more if I go around a turn or hit a bump. Hatch and all is closed tight. Any ideas?

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Now look at the switch on the drivers side and the rear hatch.

secondchance · 03-05-2019

Door switches are self-adjusting type. Meaning, it has a plunger that slides in to another piece with friction between the two. When you buy a new switch, this plunger is extended and when the door is shut, retracts just enough to allow for car to car variation. Problem is, after multiple door closing, often plunger will get pushed in too far and all of a sudden switch is too short to be pushed in sufficiently.
Trick, I found, is cut a 1/8” vacuum tube about 1/8” to 3/16” length and split open. Pull the plunger out extending the switch length and wrap vacuum tube around extended plunger. Piece of rubber vacuum tube will keep the plunger from retracting and length of the switch long enough to disengage when the door is shut.

https://www.ecklerscorvette.com/corv...E&gclsrc=aw.ds

See the skinny shaft right below flat button? If completely pushed in, switch is too short.

GOLDCYLON · 03-05-2019

For the hatch a nipple on the rear striker on the glass helps to meet the gap issue ensuring they make contact. These parts are almost 30 years old so replacement will need to occur from time to time. The drivers door and hatch normally wear out first. GC

KFoster · 03-07-2019

Thanks for the help. I think it is the passenger door switch again. Little plunger is gone. Eckler part. Maybe 2 years old. But it goes off and comes on so maybe almost long enough. I will measure it and glue a spacer on it and see if it works. I can’t remember if the eckler part was GM or not, but a strange design in my opinion. Water got the last switch or internal failure. Open the door and it would turn the lights off. Close the door and it would come on.

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03-05-2019	#1
KFoster Join Date: Jan 2015 Location: Decatur, AL Posts: 93	Interior Light On I have a recurring issue. I replaced the passenger door light switch a year or so ago and it seemed to fix the problem. Issue is back though. Interior lights will come on going down the road. Around a turn. Or just sitting they will come on sporadically when I haven’t Drive the car or opened the door that day. Have to keep it on a charger. They just come on for no reason. Really bad if they come on at night when driving. I do notice they flicker on and off more if I go around a turn or hit a bump. Hatch and all is closed tight. Any ideas? Sent from my iPhone using ZR-1 Net Registry __________________ 1990 ZR1, 1987 Mustang GT (since new), 1973 DeTomaso Pantera, 1987 928S4 Passed on: 1984 930S (gray market), 1988 Mustang Coupe Trooper car(drag)

03-05-2019	#3
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,705	Re: Interior Light On Door switches are self-adjusting type. Meaning, it has a plunger that slides in to another piece with friction between the two. When you buy a new switch, this plunger is extended and when the door is shut, retracts just enough to allow for car to car variation. Problem is, after multiple door closing, often plunger will get pushed in too far and all of a sudden switch is too short to be pushed in sufficiently. Trick, I found, is cut a 1/8” vacuum tube about 1/8” to 3/16” length and split open. Pull the plunger out extending the switch length and wrap vacuum tube around extended plunger. Piece of rubber vacuum tube will keep the plunger from retracting and length of the switch long enough to disengage when the door is shut. https://www.ecklerscorvette.com/corv...E&gclsrc=aw.ds See the skinny shaft right below flat button? If completely pushed in, switch is too short. Last edited by secondchance; 03-05-2019 at 07:50 PM.

03-05-2019	#4
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,153	Re: Interior Light On For the hatch a nipple on the rear striker on the glass helps to meet the gap issue ensuring they make contact. These parts are almost 30 years old so replacement will need to occur from time to time. The drivers door and hatch normally wear out first. GC __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V

03-07-2019	#5
KFoster Join Date: Jan 2015 Location: Decatur, AL Posts: 93	Re: Interior Light On Thanks for the help. I think it is the passenger door switch again. Little plunger is gone. Eckler part. Maybe 2 years old. But it goes off and comes on so maybe almost long enough. I will measure it and glue a spacer on it and see if it works. I can’t remember if the eckler part was GM or not, but a strange design in my opinion. Water got the last switch or internal failure. Open the door and it would turn the lights off. Close the door and it would come on. Sent from my iPhone using ZR-1 Net Registry __________________ 1990 ZR1, 1987 Mustang GT (since new), 1973 DeTomaso Pantera, 1987 928S4 Passed on: 1984 930S (gray market), 1988 Mustang Coupe Trooper car(drag)