Originally Posted by anuraagshenoy
Why is there a need for relay in this circuit?
Can I know the importance and what if the relay isn't added? Any issues in functionality of tachometer if relay isn't added?
i have faced a issue in the tacho meter backlight circuit as the -ve trigger for back light when i switch on the head light the tacho back light should on.
But in this case parking light trigger the +ve volt so when the parking switch is on my Tacho pod back light goes off when switch of the parking light then the tacho pod back light get's on.
So to fix this issue i have used a relay circuit to trigger the -Ve volt from the relay.
I have taken the positive and negative volt from the flasher switch as you can see this in my post 8.
---when relay is on -Ve volt will be supplied to the Tacho pod to back light illumination on.
---When relay is off no volt will be triggered to the Tacho pod so the back light is off.
Hope you get my point......