Warning light after speed converter fitting.

[CarlT67]

I fitted a speedo converter today, once I get to a speed of around 50-60, the red warning light in the rev counter came on and wont go out. I am guessing its because the ECU is registering a difference in speeds between the speedo and rest of car.

 

I am not sure what make it is as Paul bought it and posted it to me as the car didn't have one when I bought it.

 

The car has an Apexi FC ECU so isn't speed limited and the thing I fitted was just a speed converter not a delimiter.

[dr_jekyll]

perfectly normal. i think 90% of supes with converters do that. mine allways has. the speedo coverter is basicly a 5/8ths resistor and the ecu picks up on the voltage resistance

[CarlT67]

I don't want the light to be constantly illuminated though, I only want it to illuminate when it reads another input, for example knock.

 

Is there something I can do to prevent the ECU switching the light on...?

[dr_jekyll]

if you find out let me know.

[Supra Gaz]

I would just take the bulb out, or try a different convertor?

[CarlT67]

I have done a little reading, do I need to send a 1:1 (i.e. KPH) signal to the pink wire on the ECU loom...?

[Andy Blyth]

I have done a little reading, do I need to send a 1:1 (i.e. KPH) signal to the pink wire on the ECU loom...?

 

Yes

[CarlT67]

Where can I tap a 1:1 feed from...? The pink wire on my ECU at current doesn't connect to anything.

[Andy Blyth]

You need to keep your ECU and power steering etc. connected to the speed sensor on the gearbox while intercepting the connecion to the speedo (and maybe odometer / cruise). On my car an extra wire has been added between the speed converter 1:1 output and the ECU as it's quite difficult to split the various connections on the pink wire.

 

Note, you will not remove the speed limit by using a 1:1 output or direct connection to the speed sensor. For that you will need a speed delimiter or a combined converter / delimiter.

 

For a guide to fitting the Thor converter, see here.

[jaymdee]

Where can I tap a 1:1 feed from...? The pink wire on my ECU at current doesn't connect to anything.

 

Do a search for threads started by me. One a few weeks ago showed a wiring diagram with wires I cut and joined. Power steering now works properly and no warning light