CR420/CR66ll Lights

[Fhamre]

I adjusted both sides to about -50mv. No lights!

 

[avionic]

Measure the DC voltage on both ends of R501

 

[Fhamre]

The LEDS I used are pre made and I have used them on several Yammies,before.

 

[avionic]

Does the protect relay "click" ?

 

[avionic]

The LEDS I used are pre made and I have used them on several Yammies,before.

One or more may be kaput.

 

[Fhamre]

Measuring R501 I get about 41.5V on each side.

 

[Fhamre]

One or more may be kaput

My first thought when I saw the lights out was that the LED installed with a bit of a fight in the indicator went south. It was the first one I replaced.

 

[avionic]

A bad connection on/to L1,2,3 or 4 would put your LED's out of commission.

 

[avionic]

My first thought when I saw the lights out was that the LED installed with a bit of a fight in the indicator went south. It was the first one I replaced.

May have a broken wire.

 

[avionic]

Measuring R501 I get about 41.5V on each side.

Thats about what I figured.

 

[Fhamre]

The relay kicks!

 

[Fhamre]

A bad connection on/to L1,2,3 or 4 would put your LED's out of commission.

I will look at those connections,again. But they do look solid but will check again.
I also checked the latest LEDS I put in and they test fine.

 

[avionic]

Do a front/back resistance check between
L1 and L2
L2 and L3
L3 and L4

 

[Fhamre]

L1 and L2 6M Ohm
L2 and L3 7M Ohm
L3 and L4 5.3M Ohm

 

[Fhamre]

Not sure what a front back resistance check is but these are the readings with one probe on each point.

 

[avionic]

Not sure what a front back resistance check is but these are the readings with one probe on each point.

Diode check with ohm meter - forward and reversed bias ohms reading

 

[avionic]

So far so good..

 

[avionic]

What resistance do you read between L4 and the metal chassis ?

 

[Fhamre]

Well my wife has plans for me so I will be off for tonight.
Thank you for your efforts and advice,
It will likely be something simple.

 

[Fhamre]

Get OL on meter!
Got to go!