Strange Digital Clock happenings - Alfa Romeo Bulletin Board & Forums
 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 07-27-2019, 07:07 AM Thread Starter
Registered User
 
Join Date: Apr 2016
Location: La France Profond
Posts: 13
Strange Digital Clock happenings

Hello All,
Last acquisition an 88 Black Alfa Veloce from California. Digital Clock keeps correct time when the car is running but definitely doesn't when the ignition is off. Logic suggests the clock would need a permanently "hot" power supply all the time but what I've got suggests that supply is not full time - Any thoughts gratefully received !
Obviously not super important !
bejem17 is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 07-27-2019, 07:10 AM
BB Janitor
Platinum SubscriberAdministratorSuper Moderator
 
ghnl's Avatar
 
Join Date: Oct 2005
Location: Mebane, NC
Posts: 16,267
Garage
My guess (just a guess) is that the clock might have a small re-chargable battery. And that battery (if it has one) no longer holds a charge.

- - Eric
don't read this
~ 1984 Spider Veloce ~
- -~ 1981 GTV-6 ~
Mebane, North Carolina


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
ghnl is offline  
post #3 of 8 (permalink) Old 07-27-2019, 07:22 AM Thread Starter
Registered User
 
Join Date: Apr 2016
Location: La France Profond
Posts: 13
Thanks for the idea , the clock is a 1988 original so it's unlikely to be a button battery and the size of the box is too small ,I think, to contain a AA or AAA size rechargeable, if I get to the stage of dismantling the clock I 'll certainly have a look,
bejem17 is offline  
Sponsored Links
Advertisement
 
post #4 of 8 (permalink) Old 07-27-2019, 08:01 AM
Registered User
 
SkiBum's Avatar
 
Join Date: Sep 2017
Location: Redding, CA
Posts: 445
Garage
I imagine your 88 and my 86 are similar, mine seems to work fine. Why not just run with the ball on your idea? I'm feel sure you are on the right track, but the question is, does it need two power sources? One switched and one not? If you only had a constant supply the clock would always be "on".....
Does Jim's schematics show the clock wiring? If you don't have one I can check it out, they are all laminated to my garage wall.
SkiBum is online now  
post #5 of 8 (permalink) Old 07-27-2019, 08:17 AM
Registered User
 
GV27's Avatar
 
Join Date: Dec 2004
Location: Lakewood, Colorado
Posts: 1,754
Garage
Send a message via AIM to GV27
On an 88 the clock does get constant power and is in fact always on. It's LCD display draws very little power.

My guess is that somebody screwed with the wiring at some point and got it wrong.

Jim's diagram does show it, and his diagram is very easy to follow for figuring out just where the wires should run from/to. The service manual is clearer (for me, anyhow) on what gets powered when. I'm attaching it here - clock is on page 15.

Hit me up with a PM and I can send you Papajam's awesome color coded diagram.
Attached Images
File Type: pdf Gr. 40 Electrical.pdf (8.27 MB, 23 views)

Chris

1990 Spider Veloce

Last edited by GV27; 07-27-2019 at 08:20 AM.
GV27 is offline  
post #6 of 8 (permalink) Old 07-27-2019, 08:44 AM
Registered User
 
Dbaliko's Avatar
 
Join Date: Jul 2018
Location: Flower Mound (DFW), TX
Posts: 262
Garage
Quote:
Originally Posted by bejem17 View Post
Hello All,
Last acquisition an 88 Black Alfa Veloce from California. Digital Clock keeps correct time when the car is running but definitely doesn't when the ignition is off. Logic suggests the clock would need a permanently "hot" power supply all the time but what I've got suggests that supply is not full time - Any thoughts gratefully received !
Obviously not super important !
I also had this issue . Check to make sure that the clock is connected to a fuse that’s always hot. If there was any work done by a PO to the fuse box it could be that the fuse was somehow wired incorrectly. Especially if you’re saying that the clock comes on when the car is running, but does not show the correct time. Does the clock say 12:00 every time that you start it?

Doug

Doug - 1989 Spider Quadrifoglio S3 (Black)
Member of the Italian Car Club of North Texas & AROC

Last edited by Dbaliko; 07-27-2019 at 09:20 AM.
Dbaliko is offline  
post #7 of 8 (permalink) Old 07-27-2019, 09:02 AM
Registered User
 
GV27's Avatar
 
Join Date: Dec 2004
Location: Lakewood, Colorado
Posts: 1,754
Garage
Send a message via AIM to GV27
Quote:
Originally Posted by GV27 View Post
The service manual is clearer (for me, anyhow) on what gets powered when. I'm attaching it here - clock is on page 15.
Oh, my apologies. That's actually from the '90 service manual. I was thinking it was '88 since I have the file in the same folder as Jim's '88 color coded diagram (I don't think he made a '90 version). I think it should be the same in this area but not 100% sure.

edit: yeah it's the same connector so I do think it's the same between '88 and '90. Connector G84B.

Chris

1990 Spider Veloce
GV27 is offline  
post #8 of 8 (permalink) Old 07-29-2019, 06:58 AM Thread Starter
Registered User
 
Join Date: Apr 2016
Location: La France Profond
Posts: 13
Thanks for everyone's input, I just noticed the cig lighter is permanently live, regardless of where the ignition key is so I could spur from that to the live on the clock to see if this confirms someone has screwed up the wiring.
bejem17 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Alfa Romeo Bulletin Board & Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome