HR31 wiring issue

[Gav_21]

Hi all, having an issue with my HR31. Bought it a while ago and the previous owner had chucked a Silvertop rb20 in it. Wiring is pretty dodgy but it worked so I just left it. Motor ended up having low comp, so bought a rb20 from a ceffy. Dropped it in lost interest in it but now back working on it after a year or so. Connected everything up tried to start it and I have no spark, went over the whole car and found that my ECU isn't getting any power. Now the plug that sits near the power steering reservoir is plugged in and that connection is getting power, but LED isn't coming on, on the ECU. Here's the fun part, I have a lot of plugs down by the ECU that are getting power but they don't lead anywhere. Pictures below are of the plugs near the ECU, any help is much appreciated. Hopefully I've just missed something small or it's a fuse somewhere ect. Cheers

[Steve85]

I don't know that anyone is going to have specific knowledge on this issue. (I might be wrog though).

As someone with a basic idea of electronics, it sounds to me like you're on the right track. Just keep following your 12V back to where you can. You might find its something super easy like a termination that needs repinning or a broken wire.

Silly question: Are you sure the ECU is good? What happens if you power it up with 12V from elsewhere?

[Gav_21]

Haven't tried powering it up with a 12v source yet. I've tried 2 ECUs, both to be known working (one for the Silvertop and one that came with the ceffy motor). Will power up the ECU tomorrow and see what happens. Cheers 

[GTSBoy]

Look to the operation of the ECCS relay too.....or whatever equivalent they had in the pre ECCS era - it'll be a relay that the ECU latches on to power itself.

Edited April 27, 2019 by GTSBoy