83_maxima wrote:My clock will flash on and off. Sometimes when I will drive over the railroad tracks the clock will flash 12:00 for a while then fade out. At this point it is black most (90%) of the time.
So can this be attributed to the timer unit or the clock itself?
It's not an electrical problem, it's a mechanical problem. Whether it's a connection on the harness connectors or a broken PCB or a cracked solder joint, this isn't going to take a lot of work to track down, and once fixed it will tend to
stay fixed.
I used to repair computer monitors & terminals for a living -- bench tech, all day every day (loved the job, but that industry has gone the way of VCR repair). About one out of seven monitors' problems were a bad solder joint. Five out of seven were bad electrolytic capacitors. The rest were a pot pourri. The bad solder joint rigs were the gravy jobs, because once fixed, they
never came back for warranty.
(About one-third of the fixes on
this page are mine; most of the rest were collected by a former co-worker. Neither of us work in that field anymore, so I put it online. Back in the day, this list was jealously guarded, as it contains shortcuts for specific recurring problems for a lot of equipment, and that's how I paid the rent. Now, of course, it's nearly valueless.)
Ben, please consider sending me one of your bad clocks. I can't guarantee that the problem is in the clock and not the timer, but as you have no Timer-related symptoms in the rest of the car (and that Timer does run a whole lot of stuff!), chances are that the problem is in the clock.
I've fixed several Subaru digital clocks, they're easy. I don't have a lot of experiece with other digital clocks but I've repaired a few instrument clusters (BMW & VW mostly; no,
don't ask me to replace the dead/leaking nicads in your '80s BMW cluster!).
The radios are a different situation, tightly packed and the fluorescent display driver power supply has a tendency to fry. I've got one open here and have considered fixing it but I've always been able to find a JY one for under $15 so I keep just swapping the radios out -- hey, I'm lazy!