Interior light / That is not the dimmer switch problem
Thread Starter
Intermediate
Joined: Feb 2017
Posts: 25
Likes: 0
Interior light / That is not the dimmer switch problem
Hi All,
I have a weird problem. I can really use some good advice.
When I open the and get into my 1998 C5 Convertible, the interior lights come on and stay on in till I start the car, then they turn off.. Seems normal. When I turn the headlights on, they pop up and come on, but so do the interior lights under the dash and mirror. This makes driving very aggravating at night.
I did play with the dash dimmer switch. When I turn it all the way to the right, it does click, and the interior lights get brighter, Then when I turn to the left, it clicks and the lights go back to a softer glow and the dash then becomes dimmer the more I turn it to the left. The inter lights come on and off with the headlights regardless if the dash dimmer switch is pushed in, our out.
What say U?
I have a weird problem. I can really use some good advice.
When I open the and get into my 1998 C5 Convertible, the interior lights come on and stay on in till I start the car, then they turn off.. Seems normal. When I turn the headlights on, they pop up and come on, but so do the interior lights under the dash and mirror. This makes driving very aggravating at night.
I did play with the dash dimmer switch. When I turn it all the way to the right, it does click, and the interior lights get brighter, Then when I turn to the left, it clicks and the lights go back to a softer glow and the dash then becomes dimmer the more I turn it to the left. The inter lights come on and off with the headlights regardless if the dash dimmer switch is pushed in, our out.
What say U?
Melting Slicks
Joined: Sep 2011
Posts: 2,258
Likes: 544
From: Appleton WI
The interior lights coming on with the headlights is NOT normal. I'm not sure if you have a grounding problem at the headlight control module or where the issue is.
Free bump in hopes that 8VETTE7, Bill Curlee, or some other electrical guy see this.
Free bump in hopes that 8VETTE7, Bill Curlee, or some other electrical guy see this.
Drifting
Joined: Nov 2016
Posts: 1,660
Likes: 365
From: SF Bay Area
Do the rear compartment lights turn on as well?
Try pulling fuse 29 and/or relay 42 in the passenger footwell fusebox. If pulling those don't disable the lights, you have a short in your harness somewhere. Most likely a short between the backlight circuit and interior light circuit. Or headlight circuit and interior light circuit. What happens when you push the stalk forwards to turn the high beams on?
Try pulling fuse 29 and/or relay 42 in the passenger footwell fusebox. If pulling those don't disable the lights, you have a short in your harness somewhere. Most likely a short between the backlight circuit and interior light circuit. Or headlight circuit and interior light circuit. What happens when you push the stalk forwards to turn the high beams on?
Last edited by Tsumi; Jan 27, 2018 at 05:03 PM.
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Thread Starter
Intermediate
Joined: Feb 2017
Posts: 25
Likes: 0
Do the rear compartment lights turn on as well?
Try pulling fuse 29 and/or relay 42 in the passenger footwell fusebox. If pulling those don't disable the lights, you have a short in your harness somewhere. Most likely a short between the backlight circuit and interior light circuit. Or headlight circuit and interior light circuit. What happens when you push the stalk forwards to turn the high beams on?
Try pulling fuse 29 and/or relay 42 in the passenger footwell fusebox. If pulling those don't disable the lights, you have a short in your harness somewhere. Most likely a short between the backlight circuit and interior light circuit. Or headlight circuit and interior light circuit. What happens when you push the stalk forwards to turn the high beams on?
They did go off once while driving, hit a bump and came back on (Dam)
No change with brights.
Bob
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Drifting
Joined: Nov 2016
Posts: 1,660
Likes: 365
From: SF Bay Area
Sounds to me like you have some sort of short. Do they turn on with the parking lights, or only the headlights?
I'll go over wiring diagrams to see if I can pinpoint a place for you to start troubleshooting.
I'll go over wiring diagrams to see if I can pinpoint a place for you to start troubleshooting.
Drifting
Joined: Nov 2016
Posts: 1,660
Likes: 365
From: SF Bay Area
Try removing relay 43.
Since removing relay 42 doesn't solve the problem, it rules out a bad BCM and faulty relay control. My best guess is that there is a short between the courtesy lamp circuit and the exterior parking lamp circuit. However, there are several places where such a short can occur. Passenger footwell fusebox is where they are all commonly connected, so I would start there.
Since removing relay 42 doesn't solve the problem, it rules out a bad BCM and faulty relay control. My best guess is that there is a short between the courtesy lamp circuit and the exterior parking lamp circuit. However, there are several places where such a short can occur. Passenger footwell fusebox is where they are all commonly connected, so I would start there.
Thread Starter
Intermediate
Joined: Feb 2017
Posts: 25
Likes: 0
Try removing relay 43.
Since removing relay 42 doesn't solve the problem, it rules out a bad BCM and faulty relay control. My best guess is that there is a short between the courtesy lamp circuit and the exterior parking lamp circuit. However, there are several places where such a short can occur. Passenger footwell fusebox is where they are all commonly connected, so I would start there.
Since removing relay 42 doesn't solve the problem, it rules out a bad BCM and faulty relay control. My best guess is that there is a short between the courtesy lamp circuit and the exterior parking lamp circuit. However, there are several places where such a short can occur. Passenger footwell fusebox is where they are all commonly connected, so I would start there.
Do you think the 3 book service manual is a value to guy like me?
Thanks for all your help, this site is awesome, and has help me tremendously...
Thread Starter
Intermediate
Joined: Feb 2017
Posts: 25
Likes: 0
No, I’m still having same problem.
i can use any help in this situation, I beleave it to be a ground. I got a copy of wire diagram..
please let me know if you find answer, kinda sucks but I’ve been living with it
please let me know if you find answer, kinda sucks but I’ve been living with it
Burning Brakes
Joined: Dec 2012
Posts: 832
Likes: 14
From: Lake Charles Louisiana
Wow. Ok. Was hoping you found the issue. I'll be away from my car for about 2 weeks. Guess I'll start troubleshooting when I get back to it. If you do find the solution please post it.
Last edited by reath1; Jun 29, 2018 at 11:38 AM.
Thread Starter
Intermediate
Joined: Feb 2017
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No solution!!
im thinking the ground behind speedo.. I bought the 3 book shop manual.. I might start in November, December to try and find this problem..
if I find it I’ll let you know, and please do the same.
if I find it I’ll let you know, and please do the same.
Burning Brakes
Joined: Dec 2012
Posts: 832
Likes: 14
From: Lake Charles Louisiana
https://www.corvetteforum.com/forums...7-and-hcm.html