I did a highline to my jeep a few months back and needed to relocate my Jeep battery to the rear of the cargo area. the problem with that was the temp sensor now had nothing to read and there fore was throwing the check engine light on. I had been asking around if anyone knew how to by-pass the sensor, No one could tell me how to do this, only cause I hadn't found anyone that has made a by-pass yet. Well if you need a by pass for that sensor I did it to my jeep and it works great!!!
This is why I like the by-pass more then the sonsor. When I'd use my winch with that sensor in place and 80 degrees out side my battery would heat up sooo much that the sensor would tell the ECM to charge the battery less(like 9Volts) when in all truth you need more charging when use'n your winch, right? so with the sensor in place I'd use my winch and it would take all day to re-charge my battery, cause the winch just drained it and my ECM was told not to charge. I my mind that doesn't make sense. so with this by-pass in place I charge at a steady 14.4v, but when I use my Winch my battery voltage doesn't drop and the battery doesn't discharge like it used to. If you'd like to know how to by-pass that sensor PM me I'l be happy to tell you more and take pictures of what I did. I also have electric fans, which draw a bit more power. needless to say the by-pass fools the ECM(so the CK engine light isn't on) and instead of a 40$ temp sensor it only costed my 70 cents.