My C4 headlights has no power, so the lights do not flip up nor the lights turn on when I switch on the lights. Also, my side markers do not turn on as well. I replaced, the light switch and replaced the fuses in the front driver side of the car located in the box near the front driver wheel well. Anyone have any insight or tangible feedback. I like the C4 Shark look, but the engineers who designed the car should be assembled and lined up to face a firing squad for their ineptitude. Been trouble "shooting" these issues for months. My Corvette mechanic is salivating to charge me bucu $ to fix it. I am trying to avoid that. Love driving the car at night. Though I cannot anymore.

 

I love it when guys hammer 40 year old designs - . hindsight's always 20/20...

let me see here -- you have a 35 year old car with an electrical problem, but it's the guys who design the car that's at fault. seriously, get out your service manual, look at the headlight operation diagrams - i'd start by looking into the relay bank that controls the headlights and operation.

 

This is an interesting thread! I have a few questions:
1. Do you have 12 v. at the red wire (pin 2) into your headlight switch?
2. Do you have a volt meter?
3. Did you find anything wrong with your old headlight switch?

How are your "trouble shooting" skills? Do you have a FSM?



p.s. Your warranty has expired.

Question: Why? There are no fuses in this area that have anything to do with your problem. So you replaced fuses for what reason? Are you qualified to call the Corvette engineers "inept"?




Unfortunately, this isn't a good suggestion. There are no relays in the headlight circuit. The relays are in the headlight DOOR circuit, but since he has no lights, the problem is earlier in the circuit. Even if the relay(s) were bad, the lights would still illuminate.
Is the new switch the correct part? Is it installed correctly? Does he have 12 v. to the switch? Is his fusible link good? He's too quick to throw rocks at the engineers. I'm done.

 

C4 Electrical Exteririor Lights Issues

I see there are smarty pants a.k.a. baffoon replies in here such as JC. Point is the complex wiring components that is unnecessary in the C4 makes it tedious and problematic for the novice person. Yah, hindsight is 20/20, but factual ineptitude of C4 engineering is soo obvious when things break down. Such as replacing the rear wheel hubs. The front is easy, but the rear is a SOB to replace. So speaking of SOB's keep your smart *** responses to yourselves. In time if you keep up, you may receive something unpleasant. Keep this site to the point and be helpful is all I am saying. Real car enthusiasts have an etiquette of being helpful. Others, go play with you sheep and date it at the same time like JC 😀

 

sorry HHR, I know you don't care for my opinions, but it's just an opinion. the way you're reading the OP's original post, he developed the problem AFTER he replaced the headlight switch, and the way I read it, he had the problem and in an attempt to "fix" the problem, the OP replace the switch. I stand by my post, i'd get a FSM, and look into the headlight operation, which is part of the headlight circuit. "not a good suggestion, or bad advice," that's YOUR opinion! you know what they say about opinions, they're like A-H's, everybody has one, AND MOST OF THEM STINK -

smarty pants, baffoon, SOB, smart ***, dating and sleeping with sheep - -- and a documented threat to boot.

 

Hi Joe. Sorry we're bumping heads again. I'm not expressing my opinion, just the facts, sir. Here's the FSM diagram:



Joe, please note: The OP's complaint stated the had no headlights, and no side marker lights (and I presume no tail lights). That means he had no voltage from his headlight switch. If he had no voltage from his headlight switch, his headlight doors couldn't possibly work, so there's no sense in blaming the relays, as there's no voltage to the relays, either. This is not just my opinion, that's how things work. As Sgt. Joe Friday* used to say: "Just the facts, Ma'am!. Just the facts!"



* Dragnet TV, 1965 https://www.snopes.com/fact-check/just-the-facts/

 

well, I was pretty much done with this friggin thread, but note, NOWHERE did I blame the relays - just said i'd start at the relay bank. just the facts. a couple voltage checks at the relay bank can test both sides of the headlight switch WITHOUT tearing into the instrument panel and tell you a lot about the overall headlight circuit and it's operation. fairly sure you can't positively say there no voltage at the relays. if there is no issues with the fusible links, Pin A of both actuator relays should be 12V hot, independent of the headlight switch. that would be my first check. lets face it, getting into the C4's IP is no picnic. you can learn a lot by going directly to the relay bank - and that's just my opinion, but WTF do I know. personally, I usually check power and grounds first, then components. I should have been more clear in my original post for those with comprehension skill issues, but at this point, really don't give a rats-**** -

 

 

- WTF - is someone cloning these guys?

 

 

 

Op/C4time.

I can personally vouch for all the guys in this thread who do have the knowledge. They do and they are also very willing to help.

Sometimes, we have stuff going on in our personal lives that can make any of us particularly ornery on a particular day. it happens.

any old car is pretty complicated until a person has been through it. my guess is, that when u make a post blaming engineers of 30 years ago, rather than just saying, “this is my first time through this car and its whoopin my **** is there anyone out there who would be able to help me learn this 30year old beasts electrical system” that would show you understand that its on you or another mechanic to learn it and that u r the type of person whos ready to learn and make it happen.

The guys on this forum donate for free thier time and energy. In the main, because they are fundamentally good people who obviously like the concept of helping others.

Ive never met any of them but they have all helped me. Ive bumped heads with them too. But i have a deep respect for them and they (there are many others on this forum in addition to these three, roy jc dogs)

i sincerely encourage u to try again man. with a humble attitude rather than blaming engineers from 30 years ago.

i realize and acknowledge that this is merely an internet forum and u r likely never going to meet anyone irl, but it actually doesn’t matter. its remarkable how strong relationships can form even though few of us have ever met in person.

Would love to see pics of your car sorted at night showing completion of the headlight fix!

Unfortunately i’ve never had any headlight issues so i cannot offer much shared knowledge!

Regards VT.

PS, it is respectful discourse like this, plus an active mod program, that prevent online communities like CF from descending down the bicker-tweet-banter-quip that plauge social media platforms where anonymity or a lack of in person face to face discourse embolden otherwise nice people to type hurtful spiteful things.

Hope to see a resolution to your headlight situation soon! The knowledge is certainly here to help u out!

VT.

 

I'll accept your apology.

Have a nice day.

 

I see that Kevova tried to help the OP back in April of 2019 with this same problem, but he would not respond to Kevova's attempt to help him.

Now he's refusing our attempts to help him again. I guess he has the right to refuse help, if that's what he wants. But please, C4Time, don't waste our precious C4 time again