I believe (from what I have read) that there are two coolant temp sensor, one is for the gauge and the other is for the ECU. The one for the gauge has a single wire and that's the one with an inline resistor. The ECU coolant temp sensor has two wires.
I'm still wondering if there is any other parts that need to be removed in conjunction with it.
Bronze MFP wrote:it wouldnt only fool the gauge, but the ECU as well. It may be some cheap way to alter the timing/fuel maps... like trick the ecu into thinking the engine is always running cold. I have no idea why anyone would do that, the gains would be minimal at best. Try just removing that resistor, it *should* be the only part of that mod. keep in mind this is all speculation on my part.
on a side note, I had a 95 prelude that had a ton of crap like that done to it... half wired switches.... random wires running everywhere. took me a week to sort out and fix. I hate it when people do random trash mods to their cars then sell them for someone else to fix.