laserline alarm corsa c20xe

[craigus89]

hi guys ive got a c20xe in my corsa and recently evrytime i reverse the laserline alarm keeps goin off and the temprature gauge like shoots up like a rev counter. its doesnt do it when stationary or when driving in 1st 2nd etc any ideas and is there a earth off the alarm cheers

[MR_TOAD]

Sounds liked they have tapped into a wrong wire
but both dont sound like they are related

Would need to unplug alarm and then test

Ian