For the 4.7 ohm resistor. They have a +/- value to them and can vary within 5% I think. When I went to a local electronic store, they had several different looking 4.7 ohm 1/4 watt resistors. After measuring several of them, only one brand of the many that were there measured consistently 4.7 on the money. I purchased those and I have had good luck with the lights on my install.
However:
I'm not convinced on the weight sensor and how it actually works. When you remove it from the OEM seat, it sits on top of about 2.5 inches of foam, plus the there is a spring mesh under the seat which allows your but to sink down into the seat.
On my racing buckets, putting the sensor under the cushion and on top of the hard plastic or CF seat surface, the sensor sits static with no movement when you sit on it. The sensor can un arm and no lights will come on and you will NOT have a passenger side air bag.
The same sensor, alerts the car that the seat belt is not fastened if a person is sitting there. So theoretically, and if you have all of the harnesses plugged in (weight sensor, seat belt sensor cable, and SRS resistor in place) and you can sit in the passenger seat without the seat belt on and the light and alarm does not sound. It tells me that the weight sensor is not functioning correctly and it does not think someone is in the front seat.
I'm almost thinking that there should be some sort of pad under the sensor so it can have movement when someone sits on it. I don't think it works like a flat surface scale.
Just thinking......
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