Wanted: LCD clock

electrokid · Post by **electrokid** » Mon Aug 30, 2010 11:25 am

Yep... you're not wrong

there are indeed 4 connections - I missed one.

The 3 are as described - there is another one from the sidelights - this causes the bulb to dim so it doesn't blind you at night.

Get a meter or test bulb and connect one side to a part of the car's bodywork.
Switch on ignition and sidelights.
Probe all 4 connections with the other end of the test bulb or meter.

The connection that doesn't read 12v or cause the test bulb to light is ground / 0v.

Switch off the sidelights and re-check - the connection that was 12v before and is now dead is the sidelight connection.

Switch off the ignition and re-check - the connection that has just gone from 12v to zero is the ignition.

And the one that is still 12v is the permanent 12v from the battery (and is routed via fuse 8 according to the drawing).

Hope that helps.

electrokid · Post by **electrokid** » Mon Aug 30, 2010 11:41 am

i do that to LCD's on multi meters most days of the week

You've probably already thought of / done it - but you could put any old LCD glass onto the unit with a zebra strip to see if anything happens - they all run on 2v ish ac so at least that would check that the drives are ok ?

KevR · Post by **KevR** » Mon Aug 30, 2010 12:22 pm

electrokid wrote:
Hope that helps.

It does - thanks!
Now just got to find another clock, as I've already promised to send the two I've found so far!

electrokid · Post by **electrokid** » Mon Aug 30, 2010 3:39 pm

It does - thanks!

My pleasure