69 electrical issue

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Aug 28, 2015 | 11:36 AM

ScottE

Thread Starter

Intermediate

Joined: Dec 2012

Posts: 41

Likes: 1

From: Weddington North Carolina

69 electrical issue

On my 69 the Amp/Battery gauge is jumping and the lights go brighter as it jumps around. The alternator was replaced @ 10 years ago and it doesn't have that many miles on it. The battery always has a tricle charge connected when its sitting in the garage.

Can someone give me some direction where to start, or possible things to look at for?

Aug 28, 2015 | 11:39 AM

jnb5101

Le Mans Master

Joined: Jul 2006

Posts: 8,117

Likes: 104

From: charlotte north carolina

I would check for a bad connection at the battery terminals, ground wires and the horn relay. Do more than look at them, remove the wires, clean the connectors and reassemble. It sounds like a loose wire.

Aug 28, 2015 | 12:28 PM

derekderek

Race Director

Joined: Jul 2015

Posts: 13,082

Likes: 3,399

From: SW Florida.

replace the voltage regulator. it is separate from the alt up till 72 or 73 or so.

Aug 28, 2015 | 01:05 PM

Easy Mike

Team Owner

Joined: Jun 2000

Posts: 38,923

Likes: 1,481

From: Southbound

Cruise-In II Veteran

Quote:

Originally Posted by derekderek

...replace the voltage regulator. it is separate from the alt up till 72 or 73 or so...

Nope. It's built in beginning with the 69s. 68s are the only C3s with a voltage regulator on the fender skirt.

Aug 28, 2015 | 07:23 PM

jnb5101

Le Mans Master

Joined: Jul 2006

Posts: 8,117

Likes: 104

From: charlotte north carolina

It may be the regulator, but because I'm cheap I like to start with the free stuff.

Aug 28, 2015 | 10:20 PM

TimAT

Le Mans Master

Joined: Oct 2006

Posts: 7,123

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From: Gladstone MO

C3 of Year Finalist (appearance mods) 2019

I like free stuff too. The dash has a ground on the left side A-pillar- it's 100% beotch to get to- behind the dash pad about 2-3 inches above the hood release. And it's in a perfect place to get wet. And not make good contact.
Check every ground you can find.