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I was wondering about installing an LED in the position where an OXS light used to go in pre 87 Vans for the Check Engine Light for my 91 Van with SVX motor. I followed the track back and it dead ends. Looks like a diode/resistor/something is missing to make the connection for the ground signal to get to the light from the 14 pin connector. Can anyone help?

Thanks

I am not very familiar with the SVX, but I can tell you my approach putting an EJ22 into my '91.
The ECU turns the CEL on by supplying a ground. This means that the LED will be connected to +12v (thru a resistor)all the time. To make the connection to the ECU I used the wire that had been part of the high speed oil pressure warning system on the WBX. I avoided the big connector by cutting that wire nearby and using an insulated spade connector to connect to the wire that I added leading to the LED. I found +12v somewhere on the instrument cluster and used a resistor of about 800 ohms if I recall correctly, bringing that supply to the yellow LED that I glued into the unused OX position. I used a sharp probe to scratch thru the black coating nearby, inscribing the letters: ENG so it would be illuminated like the other symbols nearby.
Good luck. Remember that polarity matters on an LED.

Larry A.


--- In subaruvanagon@..., "Christopher" <cashinhurst@> wrote:

I was wondering about installing an LED in the position where an OXS light used to go in pre 87 Vans for the Check Engine Light for my 91 Van with SVX motor. I followed the track back and it dead ends. Looks like a diode/resistor/something is missing to make the connection for the ground signal to get to the light from the 14 pin connector. Can anyone help?

Thanks

Thanks for your help. I put a 200k ohm resistor inline as suggested by Mao at SmallCar. It's too much resistance. I can only see the light when it is night. I will try the 800 ohm resistor you are suggesting and see how it turns out.

--- In subaruvanagon@..., "larryalofs" <alofs@...> wrote:

I am not very familiar with the SVX, but I can tell you my approach putting an EJ22 into my '91.
The ECU turns the CEL on by supplying a ground. This means that the LED will be connected to +12v (thru a resistor)all the time. To make the connection to the ECU I used the wire that had been part of the high speed oil pressure warning system on the WBX. I avoided the big connector by cutting that wire nearby and using an insulated spade connector to connect to the wire that I added leading to the LED. I found +12v somewhere on the instrument cluster and used a resistor of about 800 ohms if I recall correctly, bringing that supply to the yellow LED that I glued into the unused OX position. I used a sharp probe to scratch thru the black coating nearby, inscribing the letters: ENG so it would be illuminated like the other symbols nearby.
Good luck. Remember that polarity matters on an LED.

Larry A.


--- In subaruvanagon@..., "Christopher" <cashinhurst@> wrote:

I was wondering about installing an LED in the position where an OXS light used to go in pre 87 Vans for the Check Engine Light for my 91 Van with SVX motor. I followed the track back and it dead ends. Looks like a diode/resistor/something is missing to make the connection for the ground signal to get to the light from the 14 pin connector. Can anyone help?

Thanks

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