Polo Classic 1.9 Diesel 2005 Hello people. I will try to be brief. I give contact to the pole and you can hear the preheating relay (103) and all the board symbols quickly flash. Even the tachometer goes wild and goes to the maximum. I started by testing like this: I disconnected the preheating spark plugs (I disconnected the round screw connector that is attached to the block) and it comes into contact normally. I cleaned contacts and reconnected and again the error. I removed relay 103 and it comes into contact normally (obviously it does not preheat). I tried the relay outside the car and it's perfect. I removed the preheat box (144) and it also comes into contact without problems. I even checked the brake light bulb. I have no idea what it can be. I measured the battery with a multimeter and it gave me 11.6 What else could I try? The car doesn't even try to start. The whole board goes crazy and if I start it, the whole board is paid and the clock is reset. It is clear that this happened from one moment to another. We arrived on a 150km trip with several stops where it was perfect. I stopped him at home and when I went later to start it all this mess appeared. I will appreciate any help. Thanks and regards.

Hi, do all heaters work correctly (4)? When one begins to fail, they contaminate the others avoiding their start