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Old 06-14-2002, 09:39 AM
Registered User
Join Date: Apr 2002
Location: Long Island, NY
Posts: 131
Question Clock only works with ignition on!

Any suggestions?
The clock in my '88 420SEL stops when I turn off the
ignition. While driving it keeps time just fine.

I have not yet checked anything. Where do I start?

Thanks in advance.

'83 300D
'87 Volvo DL Wagon
'88 420SEL (SOLD)
'98 Toyota Camry SE V6
'96 Ford Brono XLT
'94 Mercury Villager
'46 Willy's CJ2A
'40 Packard 110 4DSD

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Old 06-14-2002, 11:21 AM
Amuso's Avatar
Addicted to gadgets
Join Date: Apr 2002
Location: Norway
Posts: 102
I'd check the fuses. There's one that feeds the instrument clock, cigar lighter and various stuff on my 300E. And these fuses drive me nuts as they develop bad contact in my car. I am sure theres something similar in your 420 too. Just check the fusebox lid for which fuse it is, and wiggle it around a bit and see if it helps.

I'm ready to replace my fusebox this weekend with ATO fuses.

99 W210 E220 cdi sedan automatic (248.000 km) 210.006
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Old 06-14-2002, 05:21 PM
dpetryk's Avatar
Electrons can do anything
Join Date: Sep 2001
Location: Houston, Texas
Posts: 1,071
On the back of the instrument cluster there is a lone wire plugged into the back near the clock that provides a constant 12v for the clock. This wire is seperate and not bundled with any other wires. Its easy to locate. If the fuse were gone it would not power the clock even if the ignition is on.

Pull the instrument cluster and check for voltage on this wire. If none, then you have to back track to the source to find the interruption.
I got too many cars!! Insurance eats me alive. Dave

78 Corvette Stingray - 3k
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