Electrical issues
Thread Starter
7th Gear
Joined: Dec 2007
Posts: 7
Likes: 0
From: Waxahachie Texas
Electrical issues
Just bought a 66 that I need to get it titled and inspected next week. Everything is working but the horn and front parking lights. Any help to track down the issue/s is greatly appreciated.
Race Director
Joined: Jan 2002
Posts: 15,342
Likes: 2,717
From: Close to DC
C2 of the Year Finalist - Modified 2020
Get a electrical schematic/diagram. The firewall connector might be your problem. Remove it carefully, and clean all the contacts on both sides. Check the parking light connector in each front wheel well for power. Check the light bulbs and the unit itself as they can get corroded from wheel splash. Check to see if you have power up to the horn contact. If you do, it may be just in need of adjustment of the contact ring. 
Dennis
Dennis
Le Mans Master
Joined: Nov 2000
Posts: 7,246
Likes: 21
From: Going too fast over the hill. Iowa
When you press the horn button you should hear the relay click. If you do, the problem is after the relay as long as the green wire going to the horns has 12 volts. If when the relay clicks, the green wire does not get 12 volts, the relay is bad. If you get 12 volts at the horns, they are corroded internally. Get a cheap replacement for the inspection.
The 20 ga purple wire in the LH (driver's side) bulkhead plug carries 12 volts from the light switch to the parking lamp filaments. There is a wiring diagram link in the help section near the bottom of this web page: http://home.mchsi.com/~magicv8
You can save a copy of the diagram or print it in any size you want.
Be sure to check both bulbs. It's not unusual for both to be out at the same time.
The 20 ga purple wire in the LH (driver's side) bulkhead plug carries 12 volts from the light switch to the parking lamp filaments. There is a wiring diagram link in the help section near the bottom of this web page: http://home.mchsi.com/~magicv8
You can save a copy of the diagram or print it in any size you want.
Be sure to check both bulbs. It's not unusual for both to be out at the same time.
Last edited by magicv8; Sep 13, 2010 at 08:49 PM.
Le Mans Master
Joined: Aug 2009
Posts: 5,474
Likes: 16
From: Houston Texas
St. Jude Donor '10-'12-'13
Grounding issues are #1 with Vettes. Check your rag joint at the steering box. It should have a ground wire wrapped into it. That will affect the horn.
Do yourself a favor and buy the Assembly manual (AIM) and the Corvette shop manual.It will become a constant refference.
Do yourself a favor and buy the Assembly manual (AIM) and the Corvette shop manual.It will become a constant refference.
Last edited by MiguelsC2; Sep 13, 2010 at 05:45 PM.
