Post by
QCtech »
https://forums.nicoclub.com/qctech-u272909.html
Thu Jun 22, 2017 12:31 am
If you know how to use a multimeter and have some patience, you can go by the manual and test every connector yourself. It is not that difficult and you dont have to "rip the harness apart". Just go to the connector and measure each cable. In page SE-17 on the service manual in the manual section of this website, it shows the electrical diagram. You can disconnect the harness at the BCM and at junction B10/B411 and measure for continuity. You can do the same for the ground following the diagram. That chapter and the general chapter at the beginning of the manual shows you how to interpret the schematics and where to measure. Remember to disconnect the battery negative terminal before doing any work and to disconnect the BCM connector and all the other connectors following the route to the seat. Measure the switch and follow the cable in the areas of the seat where the cable will bend or kink. The dealer will do exactly the same and if they dont have time, they would just want to install a new seat. In that case, buy it used in good condition from a yard or CL. Also, what fuse are you changing? Because I dont see a fuse that is exclusively for the motors in the power seat, it all comes from the BCM. (at least on the SE section of the manual). If you are having cabin lights and mirrors, I would look for a bad ground to the BCM, and not only for the seat. Have you added or changed anything lately like a radio or anything that could have been grounded in a wrong place? The ground for the BCM shows to be at junction M95. so you could check that ground first. In case that there is a short in the seat itself that is shorting the fuse thru the BCM, then check first the junctions of both lifting motors fwd and aft, and the sliding motor. These are all identified in the manual and you should lose the nuts at the base so you can move the seat back or side and see all the motors and cables clearly.Page SE-20 of the manual shows B436,B437,B438 as the junctions for those motors and all of them are connected to a common ground. Hope this helps.