Keith Browning Posted October 20, 2018 Share Posted October 20, 2018 This is something I have never seen before AND it is not OEM as far as I know as I have never seen it. At the center of the picture is a Littlefuse fuse with the marking "ST" and it is a JCASE cartridge style fuse with a black colored body. I cant find it in the Littlefuse product listings (still searching) to identify it. His thing looks serious and could easily cause some damage to a harness and a vehicle if things got out of hand. Quote Link to comment Share on other sites More sharing options...
cbriggs Posted October 20, 2018 Share Posted October 20, 2018 That is definitely OEM. I have seen them all over. I believe ST stands for shunt. Not a protection device, just a jumper. Quote Link to comment Share on other sites More sharing options...
forddieseldoctor Posted October 21, 2018 Share Posted October 21, 2018 https://littelfuse.com/products/fuses/automotive-passenger-car/specialty-products/jcase-shunt.aspx Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted October 21, 2018 Author Share Posted October 21, 2018 And there we have it. Thanx! I suspected that ST signified shunt. I don't think that I have ever seen one installed in a Super Duty before... make that I just never took notice. It is shown in the ABS schematic as a shunt in F1.8 feeding F1.22 and F1.23 for a 2005 Super duty in the BJB. Quote Link to comment Share on other sites More sharing options...
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