<VV> Monza clock

Larry Forman larry at forman.net
Mon Feb 27 21:53:56 EST 2017

Here are some of my thoughts, but I have not checked a schematic, so I 
could be wrong with this information.  You will need to take the clock 
apart to see if you can repair it yourself.

I believe these are relatively easy to repair.   Usually it is the 
points that are burned and do not function.   These have a set of points 
and an electromagnet that pulls and "winds" the clock for several 
minutes until the spring winds down and the points touch connecting the 
electromagnet to 12 volts repeating the cycle.   The auto companies went 
cheap and normally did not have a points condensor (capacitor) to absorb 
the electric spark formed by the collapsing electromagnetic field.   
Small diodes were not available cheap back then and are usually a better 
way to prevent the spark from burning the points.

See if you can manually pull the spring to wind the clock and if it then 
runs for several minutes before stopping.   If so, then you might be 
able to file the points and add a condensor or catch diode circuit.   
The diode would be across the points and point toward 12 volts positive.

Another approach would be to replace the mechanical mechanism with a 
modern electric clock module.   I do not recommend doing this as it will 
ruin a possibly repairable clock and it will also be obvious that 
without the "click" every several minutes that the clock is not stock.

Good luck,


On 2/27/2017 5:38 PM, richard simoff via VirtualVairs wrote:
> Just bought a 66 Monza for $1500.  Needs a little work, but it has a clock that needs repair. It looks ok but when I hook up 12 volts...nothing. Clark's has em for $300 something.  For a $1500. Car?  Any body have one cheaper? Anybody fix these things?
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