E manager ultimate


Fresh Recruit
Hi guys and girls
So i have a ultimate ecu with plug and play harness. Iv brought it second hand and pluged it in etc car runs and starts and boost etc witt the current map but there is a grey and grey/black wire cut on the plug and play side of the loom what are these for ? Any one have a instal guide or is it as simple as plug and play to stock ecu and i dont have to cut any wires etc just trying to work out why i have a few wires cut on the plug and play harness