Electrical problem in Ford Maverick TD2.7 GLS

Hello good afternoon

to see if anyone knows what this happens in Ford Maverick TD 2.7 GLS of 1995, is the same as the Nissan Terrano II 2.7 Diesel 100 hp. I give the contact and the only thing that turns on in the control box is the Air Bag witness, but then the car does start, but the control box does not work, nor the windows, etc. Until I hit him an accelerated and starts to work, with the light of the Air Bag on. If someone knows what can be, thanks in advance.


MPG greeting