LED Gremlins

[Origin7]

I am converting the halogen indicator lights on my older Cat to LED. I am wondering if anyone else has encountered the issue I am having. 

 

I did the following:

 

1. Installed LED bulbs in the front indicators

2. Installed an LED relay

3. Installed rear indicator bulbs

 

So far, so good. Everything worked fine and was super bright. Next, I installed factory Caterham LED front side markers. This is when the gremlins arrived. Now, all 6 are blinking together, instead of 3 right or 3 left. Voltage had to be backfeeding between the left and right sides somewhere in the circuit. The two common components are the relay and the dash light. The relay tested fine, so I removed the bulb on the dash. Sure enough, this fixed it. So I need a more permanent solution. My dash indicators are 37 years old. Does anyone know if newer ones will resolve this?

 

Thanks in advance. 

 

    

[7Westfield]

A few years ago, I added a beeper to mine, because the light was right behind the top of the steering wheel. Had the same issue

Fixed it with a pair of diodes feeding the buzzer, one from each side

 

 

[Scott_]

I think @westfield is right.   Your indicator bulb is creating a back-feed path between the two circuits so the diodes should stop that.

 

Scott.

[Origin7]

Thanks! Diodes are on order. 

 

Mike