Ignition not turning off

[Struggler]

Bit of a weird one! But went to run up my track car this evening to find the battery completely dead. Not a sausage. My nephew had been playing with the switches so I assumed it was just him playing around and I had left the ignition on by mistake.

No bother, stuck it on charge for a bit. Then got bored and jump started it off another car. All good until I went to turn the engine off. Turned the key, and nothing happened, ignition stayed on and the engine kept running. Thankfully I have a fuel cut off switch so could actually get the car to shut down.

Been trying a few times switching the ignition on and off. Sometimes it turns off on the key as normal and sometimes it just stays on. Then sometimes it pings off after a few seconds and others it just stays on even without the key. Turning the battery isolator off kill it completely only for it to come back one when the isolator is switched on (albeit with the immobiliser light now going mad because there's no key).

Even unplugged the ignition barrel and it made no difference (once it was staying on).

Anyone seen this before? Bit of a weird one.

 

[NorthloopCup]

UCH or dodgy relay would be my guess. My gen90 used to draw the battery down because something wasn’t shutting down properly , but I never got to the bottom of what the issue was, as the car was split for parts after it shat the driveshaft and cost me £2.5k at the Nurburgring.

 

[Struggler]

I'm also running a gen90, not sure there is cross over with that...

Is there a main ignition relay somewhere I can investigate? A sticky relay sounds more plausible to me, perhaps that's just me hoping it's not the UCH as that sounds like a headache.

Also, I'm sure this is completely unrelated but my hazard switch is normally on the Fritz and has suddenly started working again. Could that be shorting internally somewhere and sending 12v up an ignition wire? Kind of like the old novas where you could just flip the switch and start the car!

 

[NorthloopCup]

Well mine only did it after the gen90 was fitted, so it’s either something internally not sending the power down command, or it’s a sticky relay imo.

Lol disconnect the hazard switch would be my first port of call and see what/if that changes anything.

 

[Struggler]

Is there a relay bank in the car that houses a main ignition relay do you know? Sounds like a good start.

Yeh already got the hazard switch on my list of things to try.

 

[NorthloopCup]

It’s been a long time since I’ve had the misfortune of looking at clio wiring mate, so I’ve forgotten