before jumpering the resistor - make sure the wiring to the resistor is heavy enough to support the amp draw of the fan at full power.
In the W124, the low speed wires from the fusebox are quite thin and making them carry the full 25 amp load of the fans will burn them out, The full speed wiring is heavy and is screwed on the resistor out leg. (I actually saw a car with burnt wiring from doing the bypass mentioned)
If the resistor is not behaving, invest in a better one and move is somewhere else or mount it to the cars body with some good heatsink paste.
__________________
2012 BMW X5 (Beef + Granite suspension model)
1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)
|