clock resets to 1:00 when starting
Thread Starter
Burning Brakes
Joined: Jan 2011
Posts: 1,203
Likes: 2
clock resets to 1:00 when starting
While starting my 01 c5z the clock will reset itself to 1:00.Battery is new [ It has 12.7 volts] and car charges at 13.8 most the time.I have cleaned grounds,battery connections,starter connections and cleaned and sanded the ign switch.Out of every 10 starts the car my reset clock twice,then next day it may do it 8 out of 10 times.I'm afraid this may cause oyher probloms like my alky control not to work or something.Any ideals
Le Mans Master
Joined: Feb 2002
Posts: 6,937
Likes: 21
From: Waldorf MD
I thought the clock resets to 12:00 (when voltage is lost) ?
If you have your DIC set to read anything other than "mileage/odometer" does it reset to the odometer? If so, than your voltage during starting is falling too low.
Get a load check on your new battery. Your voltage indicates it is 86.7% charged, but a load test is the TRUE TEST of a battery's condition. Most places that sell batteries will do a load test for free.
New batteries can sometimes be bad.
If you have your DIC set to read anything other than "mileage/odometer" does it reset to the odometer? If so, than your voltage during starting is falling too low.
Get a load check on your new battery. Your voltage indicates it is 86.7% charged, but a load test is the TRUE TEST of a battery's condition. Most places that sell batteries will do a load test for free.
New batteries can sometimes be bad.
Last edited by Oldvetter; Oct 15, 2012 at 10:47 PM.
Team Owner
Joined: Jul 2006
Posts: 22,190
Likes: 4,178
From: Kannapolis NC
On a C5, the clock resets to 1:00.
It's got to be losing voltage during crank. I know you said new, but I'd load test the battery first. Then double check the battery connections, including negative connection. Then I might start looking at the ignition switch contacts. Maybe Bill C. or one of those guys could let you know whether that symptom can come from an ignition contact problem. I know that when the battery voltage drops below a certain amount during crank, the clock can reset and the HUD display will default to oil pressure no matter what you had it set on.
It's got to be losing voltage during crank. I know you said new, but I'd load test the battery first. Then double check the battery connections, including negative connection. Then I might start looking at the ignition switch contacts. Maybe Bill C. or one of those guys could let you know whether that symptom can come from an ignition contact problem. I know that when the battery voltage drops below a certain amount during crank, the clock can reset and the HUD display will default to oil pressure no matter what you had it set on.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Have your battery FULLY TESTED //// Its dropping very LOW voltage wise during cranking..
It can also cause relay and module damage if it continues.
BC
Drifting
Joined: Jun 2013
Posts: 1,294
Likes: 367
From: Iowa
I have a similar symptom I noticed the other day. I started the car and the clock flashed 1:00 then 2:00 and then displayed the correct time. Would a battery cause this too? I too have a brand new Red Top.
Advanced
Joined: Oct 2011
Posts: 97
Likes: 24
From: kansas city missouri
On a C5, the clock resets to 1:00.
It's got to be losing voltage during crank. I know you said new, but I'd load test the battery first. Then double check the battery connections, including negative connection. Then I might start looking at the ignition switch contacts. Maybe Bill C. or one of those guys could let you know whether that symptom can come from an ignition contact problem. I know that when the battery voltage drops below a certain amount during crank, the clock can reset and the HUD display will default to oil pressure no matter what you had it set on.
It's got to be losing voltage during crank. I know you said new, but I'd load test the battery first. Then double check the battery connections, including negative connection. Then I might start looking at the ignition switch contacts. Maybe Bill C. or one of those guys could let you know whether that symptom can come from an ignition contact problem. I know that when the battery voltage drops below a certain amount during crank, the clock can reset and the HUD display will default to oil pressure no matter what you had it set on.
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