hotponyshoes
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- Somerset. Uk
A bit long-winded this...
I have an outboard engine on a boat.
There is a small box mounted by the key with 2 warning lights in it. Red for Overheat and Green for Oil Pressure.
When the key is turned on both lights illuminate for a 2 second self test then turn off.
Once the engine is running the green light will come on all the time to show the oil pressure is good.
Basically I am trying to interface these to a remote alarm but for now just suppose I would like to add 2 repeater lights to function in tandem with the existing ones...
The box housing the lights has 5 wires going into it, Ground, Perment Live, Key Switched Live, Green wire for the oil bulb and Red wire for the Overheat.
The bulbs are LED's.
The 2 bulb wires run directly to dedicated pins on the engine ecu.
I pinged the 2 bulb wires out with a multimeter and they both appeared to drop to ground during the self test.
If I connect a +12v supply to one side of a filiment bulb and connect the other side of the bulb to the red wire for the overheat it works as expected.
My extra bulb lights up and goes off with the original dash bulb. If I swap the extra bulb for the coil contacts of a relay it will switch that instead.
My problem is with the green oil bulb.
If I connect a filiment bulb in the same way and turn on the key neither the new bulb or the dash bulb come on during the self test. After the self test is complete both bulbs light up at about half brightness (when they both should be off)
If I swap the filiment bulb for a led bulb then during the self test the dash bulb works normally but the led does not come on at all. After the self test the dash bulb goes out and the led bulb lights up at full brightness.
If I reverse the extra led bulb the dash works as it should but the extra bulb does nothing at all.
What's going on there?
I have an outboard engine on a boat.
There is a small box mounted by the key with 2 warning lights in it. Red for Overheat and Green for Oil Pressure.
When the key is turned on both lights illuminate for a 2 second self test then turn off.
Once the engine is running the green light will come on all the time to show the oil pressure is good.
Basically I am trying to interface these to a remote alarm but for now just suppose I would like to add 2 repeater lights to function in tandem with the existing ones...
The box housing the lights has 5 wires going into it, Ground, Perment Live, Key Switched Live, Green wire for the oil bulb and Red wire for the Overheat.
The bulbs are LED's.
The 2 bulb wires run directly to dedicated pins on the engine ecu.
I pinged the 2 bulb wires out with a multimeter and they both appeared to drop to ground during the self test.
If I connect a +12v supply to one side of a filiment bulb and connect the other side of the bulb to the red wire for the overheat it works as expected.
My extra bulb lights up and goes off with the original dash bulb. If I swap the extra bulb for the coil contacts of a relay it will switch that instead.
My problem is with the green oil bulb.
If I connect a filiment bulb in the same way and turn on the key neither the new bulb or the dash bulb come on during the self test. After the self test is complete both bulbs light up at about half brightness (when they both should be off)
If I swap the filiment bulb for a led bulb then during the self test the dash bulb works normally but the led does not come on at all. After the self test the dash bulb goes out and the led bulb lights up at full brightness.
If I reverse the extra led bulb the dash works as it should but the extra bulb does nothing at all.
What's going on there?