Meat Plow wrote:

On Sat, 17 Nov 2007 19:50:55 +0200, Mike wrote:

I have a light that refuses to go on.

The light switch (wall type) is connected to a relay. Now the relay won't
"click". It used to work a couple of days ago. The relay has operating voltage of
24V which switches a 240V line (lights).

I would like to test (using a voltmeter) where I'm having problems. How do I
measure if 24V is going through the coil/magnet.

The relay box looks like this (wires go to points A,B,C,D):

A 24V b
-------------
| |
| |
| |
| |
| |
C------------D
240V

When the switch is off volmeter shows 240V between C and D

When the switch is on volmeter shows 0V between C and D

How do I measure voltage in A and B?

If C and D drops to zero then I would assume the relay is closing.

The voltage on A and B should be 24 volts when the switch is on.

Thanks for the quick reply.

The relay is rated 24V-8V. I'd like to know what I am getting.

What if I (using my voltmeter) connect A or B to ground Should I then get 24V on
my meter.