OK I am installing aftermarket fan for radiator. Stock harness has 4 wires:

1. BLACK
2. WHITE/BLUE
3. WHITE/BLACK
4. BLUE/GREEN

And my fan has only 2:

1. BLUE
2. BLACK

I don't want to make a fire so please help me here and tell me how to connect this

 

not sure but if you have a two wire set up it might not work if you have air conditioning b/c you have four wires from the car for that reason. If not the black wire is a ground and the blue is your power source on your new fan

 

My guess there is 2 ground wires and 2 'live' wires (LOW and HIGH) on a stock harness. Can I connect 2 ground wires with a ground wire on new fan and a power wire with LO and HI wires from harness?

 

I wouldn't use the low and high together, but you could use the high but you will have to play with the wiring to get it to come on with the ac and as well temp

 

Since you guys don't want to help I am going to connect 2 (+) wires from stock harnes with (+) on the new fan and 2 (-) wires with (-) on new fan. If my car catches on fire its your fault!