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I was wondering if the electrical wizards here can help me.
I want to replace the SINGLE coolant sensor with a MB *double* sensor, that way I don't have to use the sensor that sticks into the radiator fins to trigger my electric puller fan that replaces my viscous fan. Pins 1 & 4 act just like the "blue" coolant sensor that triggers the Aux. fans. However, Pins 2 & 3 have a smaller value. The Derale adjustable thermostat uses a sensor that gives higher values. Here's a brief table (yes I know, it's incomplete) in OHMS: Double-sensor Celsius Pins 1/4 Derale 44.4 970 5525 48.9 810 54.4 730 60.0 570 65.6 470 71.1 396 74.4 361 76.7 345 82.2 309 2924 85.6 268 87.8 252 91.1 228 93.3 215 95.6 195 97.8 190 2750 98.9 188 2460 100.0 186 2240 If I want to trigger the Derale to come on at 93.3-Celsius how can I get the MB sensor on pins 1/4 to mimick the values of the Derale (note- it's adjustable to a point)? I was thinking of adding in series a resistor (I think resistors in series you add them together) that would get me in the "magic range" but the resistor value cannot be high-enough to trigger it on until 93.3-Celsius. Thanks in advance, :-) neil 1988 360TE AMG 1993 500E |
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