C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

'tail' fuse question

Thread Tools
 
Search this Thread
 
Old Oct 5, 2011 | 09:02 PM
  #1  
Xterrable's Avatar
Xterrable
Thread Starter
Racer
 
Joined: Oct 2011
Posts: 294
Likes: 0
From: Easton pennsylvania
Default 'tail' fuse question

What else is on the 'tail' fuse on a 74 rag top?

After using the lights for 15 minutes or more, I pop that fuse which leaves me without parking lamps or Gauge lights....

I know that when I look under the dash I see a bunch of wire splices. I am considering buying a new wiring harness for the car. I see 3 different ones. A front, rear and what seems like interior. I see one that is around 450 bucks that includes the fuse box. Can someone explain what wires are included in that wiring?

Thanks
Steve
Reply
Old Oct 5, 2011 | 11:10 PM
  #2  
wombvette's Avatar
wombvette
Le Mans Master
15 Year Member
 
Joined: Jan 2000
Posts: 8,918
Likes: 27
From: New Hill NC
Default

Originally Posted by Xterrable
What else is on the 'tail' fuse on a 74 rag top?

After using the lights for 15 minutes or more, I pop that fuse which leaves me without parking lamps or Gauge lights....

I know that when I look under the dash I see a bunch of wire splices. I am considering buying a new wiring harness for the car. I see 3 different ones. A front, rear and what seems like interior. I see one that is around 450 bucks that includes the fuse box. Can someone explain what wires are included in that wiring?

Thanks
Steve
Well, thats about it. What you see go out when the fuse blows, is whats on the circuit. The dash lights are on that one to give you warning that the TLs are out.
Reply
Old Oct 6, 2011 | 12:09 AM
  #3  
Xterrable's Avatar
Xterrable
Thread Starter
Racer
 
Joined: Oct 2011
Posts: 294
Likes: 0
From: Easton pennsylvania
Default

So my short could be in the front or rear lights or some where in the gauge cluster. I am banking it's somewhere in all those splices, or a worn wire... what's the chance it is in the switch?
Reply
Old Oct 6, 2011 | 05:39 AM
  #4  
joewill's Avatar
joewill
Safety Car
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2007
Posts: 4,458
Likes: 331
From: Indy Indiana
Default

with it waiting 15 minutes to pop, could be that fuse is heating up and then finally blowing. no event 15 minutes later causes a short?.. try a higher amp rated fuse.

wiring harnesses may be 450$, but labor will be triple that..


does it blow during the day when the taillights are not on?
Reply
Old Oct 6, 2011 | 07:56 AM
  #5  
Xterrable's Avatar
Xterrable
Thread Starter
Racer
 
Joined: Oct 2011
Posts: 294
Likes: 0
From: Easton pennsylvania
Default

Havent had it out enough to say if it pops during the day. I got it on Friday. Drove it home (about an hour) with the parking lamps on. It made it the whole hour just fine. Went to put it in the garage and noticed that the fronts were out. The next day when I went to start digging into it, I saw that the rears were out. Replaced the fuse and it was all good.

Went out last night. Had the lights on for 5 minutes, then off. On again for 5 more minutes, then off. Then on again for the 15 minute ride home. The fuse blew as I pulled onto my road..

I am afraid of running a higher rated fuse. Dont want the car to melt..
Reply
Old Oct 11, 2011 | 09:15 PM
  #6  
Xterrable's Avatar
Xterrable
Thread Starter
Racer
 
Joined: Oct 2011
Posts: 294
Likes: 0
From: Easton pennsylvania
Default

Well, I think I might be narrowing it down. Drove the car for 2 hours during the day, lights off, fuse did not blow.

I then drove it for about an hour at night with the lights on, BUT I noticed that my dash lights only work when the headlight switch is in one specific position. So I drove home with the lights on, but with the dash lights out.

With a lot of my dash wiring having splices in them, I am thinking that it is either the headlight switch causing the lights to blow, or one of the many splices under my dash..
Reply
Old Oct 12, 2011 | 12:55 PM
  #7  
Easy Mike's Avatar
Easy Mike
Team Owner
Supporting Lifetime
20 Year Member
 
Joined: Jun 2000
Posts: 38,923
Likes: 1,481
From: Southbound
Cruise-In II Veteran
Default

If memory serves, nothing should be on the tail light circuit except the tail lights.

If dash lights will not dim up or down by turning the headlight ****, the rheostat has died and you need a light switch. IP lamps have their own fuse.

Reply
Old Oct 12, 2011 | 01:50 PM
  #8  
Xterrable's Avatar
Xterrable
Thread Starter
Racer
 
Joined: Oct 2011
Posts: 294
Likes: 0
From: Easton pennsylvania
Default

IP Lights? I assume they are parking lights?

I read somewhere else on here that the "TAIL" fuse was for from and read parking lamps and gauge cluster...

Could a bad rheostat cause the fuse to blow?
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-1

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-2

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-3

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-4

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-5

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
Old Oct 12, 2011 | 02:36 PM
  #9  
7T1vette's Avatar
7T1vette
Team Owner
15 Year Member
Community Builder
Community Influencer
Top Answer: 5
 
Joined: Jan 2006
Posts: 37,637
Likes: 3,116
From: Crossville TN
Default

Check to see if the area around the light switch is getting warm/hot when your lights are turned on. If so, the contacts in the light switch are corroded and are drawing more current than they should. Also, that current is being converted to 'heat', which is not a good thing in the dash area. If it is more than "mildly warm", you need to remove the switch and clean the contacts or replace the switch.
Reply
Old Oct 12, 2011 | 04:23 PM
  #10  
Easy Mike's Avatar
Easy Mike
Team Owner
Supporting Lifetime
20 Year Member
 
Joined: Jun 2000
Posts: 38,923
Likes: 1,481
From: Southbound
Cruise-In II Veteran
Default

Originally Posted by Xterrable
...IP Lights? I assume they are parking lights?...
Instrument Panel

...Could a bad rheostat cause the fuse to blow?
Yes.
Reply

Get notified of new replies

To 'tail' fuse question





All times are GMT -4. The time now is 09:43 PM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE