Electronic buzz from rear end?

Reply Subscribe

Thread Tools

Search this Thread

Sep 22, 2022 | 03:57 PM

Tacos_117

Thread Starter

2nd Gear

Joined: Sep 2022

Posts: 2

Likes: 0

Electronic buzz from rear end?

My 78 C3 sits most of the year with no issues. Starts up every time. All original with good battery.

Suddenly a quiet hum/buzz started coming from under the rear, seamongly around the spare tire.

I disconnected battery and it went away.

Any ideas?

Thanks!

Sep 22, 2022 | 05:17 PM

Mooser

Race Director

Joined: Apr 2011

Posts: 11,183

Likes: 3,334

From: North of Toronto - Ontario

Does it have a power antenna?
M

Sep 22, 2022 | 06:34 PM

Tacos_117

Thread Starter

2nd Gear

Joined: Sep 2022

Posts: 2

Likes: 0

Quote:

Originally Posted by Mooser

Does it have a power antenna?
M

it does, but it hasn't been used in 15 years. I'll check it out, thanks!

Sep 23, 2022 | 07:32 AM

4-vettes

Race Director

Joined: Nov 2006

Posts: 13,177

Likes: 7,780

From: Sunshine Coast, Queensland, Australia

2025 C3 of the Year Finalist - Modified

2024 C3 of the Year Finalist- Modified

2022 C3 of the Year Finalist - Modified

Cruise-In VIII Veteran

Can't think of anything else in the rear of a 79 that could buzz. No electric fuel pump unless converted.
Edit: What about the alarm horn in the left rear quarter panel just behind the door.??

Sep 23, 2022 | 08:47 AM

interpon

Le Mans Master

Joined: Jun 2019

Posts: 7,649

Likes: 2,466

From: Indiana

i'm going power antenna or speaker.. pretty sure alarm horns are front fender if like a 79..

the only other i can think of is rear defogger???

or some after market as above